So, now that I have made my own post in the Feedback thread, I have read the other ones.

Apparently, and as expected, each of the four members who have posted so far has a different least favourite skill (i.e. the one they would cut if they had to cut one).

IchoTolot: favourite Laserer, least favourite Slider
Proxima: favourite Slider, least favourite Laserer
WillLem: favourite Slider, least favourite Spearer
Me: favourite Laserer, least favourite Grenader

So one "cull-if-it-has-to-be" vote for each skill. In other words, no overwhelming dislike for any particular skill.

Sounds to me like more evidence that we should keep all four !

Yes, quite a few of them are still at least somewhat of a backroute - and I haven't even had a chance to look at kaywhyn's solutions for the main ranks yet.

I assume there won't be many more backroutes on the first couple of ranks... so if you want to, you can start uploading those. At least I don't remember a lot of backroutes from your replays for the first two ranks, because those had already been played by both Colorful Arty and Flopsy. And whatever I found for those I'm pretty sure I have fixed by now.

But you can expect at least one huge update once I've watched all of kaywhyn's replays.

My collection of your replays also somehow stopped at 12th September - I guess this may have to do with my old laptop having crashed in the meantime, so maybe this was the latest state I had saved somewhere. Anyways, I also re-checked you replays since 17th September, and there are also some things on the Rockstar and Legend rank I can hopefully enforce better. (For example, on "Holy mountains", you could just go beneath that entire temple structure, or on "Blowing in the wind" you could completely ignore the upper exit by simply connecting the crowds. These are the types of backroutes that a few steel walls can fix quickly.)

However, I always implement the changes in Old- and New Formats in one swoop, so that I don't forget any. And right now, I don't want to fix any levels before I've watched kaywhyn's replays (even if they're for Old Formats).

Because I've noticed, some of the fixes I've implemented for kaywhyn's Groupie solutions now already broke some of your solutions for those levels (e.g. Groupie 05). I assume that's because you had found a similar backroute as him, especially with your announcement that you "re-backrouted the levels" . But of course, I can never be sure.

The downside of "watching everything first, then implementing the changes" is of course that with such a large pack, it's still easy to overlook somethings when going back to the level editor. I do watch them in bites, of course, not in one piece, and I do take my notes where necessary... but still, some backroutes can always slip under the radar.

It's nice that we have so many different graphic sets, but by now it's really getting hard to keep the overview. Not over the standard orig, ONML, and L2 tilesets, which are right at the start (where they should stay, since they are probably the most-frequently-used ones). But when it comes to custom tilesets, the order in the dropdown menu in the editor seems fairly arbitrary.

Yeah, sure, I can understand why namida's Lemmings Plus tilesets are first in the list after the official tilesets - he created and maintains this entire thing, after all, and we all are very thankful for it .

However, even after namida's tilesets, the order doesn't really seem to be alphabetical or anything else: Gronkling comes before Flopsy, then it jumps back to Arty, then Raymanni, then IchoTolot, then the Freedom-Planet tilesets... I often spend a long time just scrolling through this list, even though I know exactly which tileset I want to pick, but I just can't find it quickly.

In addition, each line start's with the name of the tileset, not with that of the author; so sometimes, if the tileset name is long enough that you can't properly see the author, it would be hard to tell the order even if it were alphabetical.

I think it would be in everyone's best interest, for the sake of convenience, if we bring some order into this randomness.

My suggestion would be:
1) Everything from the orig tilesets down to the L3 tilesets remains as it is right now.
2) After that section, the custom tilesets currently start with namida's Lemmings Plus tilesets. I wouldn't necessarily mind them staying there, with the alphabetical order starting after namida. However, especially for those LP tilesets that GigaLem has revamped, most people are probably using those more frequently now. So it doesn't really make sense for the original LP tilesets to take precedent in this regard.
3) Maybe the format shouldn't be "Tileset name (Author)", but "Author: Tileset name"? Since we're reading from left to right, it would be much easier to tell this way where you are in the alphabetical order. But this is just optional.

Whether the naming scheme starts with the author or the tileset name itself:
Just begin the custom-tileset list with authors starting on A, and then continue that all the way down to zanzindorf. In case of Colorful Arty, we / he need(s) to decide whether he should go by his full name (i.e. letter C), or just by "Arty", as it's written in the editor right now (i.e. letter A). Given the limited width of the dropdown menu, shortening it to "Arty" is probably more practical.

An alphabetical order is not a value judgment, after all - it's neutral and purely pragmatical.
This should apply to all tilesets which have been "officially approved", i.e. are part of the official styles download.

After the letter z, we could have all the special tilesets at the bottom, followed by whatever the individual level designer maybe added by him- or herself, but what isn't part of the official download (yet). In my case, all my custom sprite recolourings go there.

Thanks to WillLem for the info about the "dink!" sound when the maximum release rate is reached. I'd be fine with that. Setting the release rate to 99 is the main thing I use it for. Slightly turning it up is only required on a few levels that have release-rate fiddling as part of their intended solution.

If IchoTolot is against this change, the only workaround that would please both sides would indeed be to have the option of enabling or disabling every sound separately... except for object-specific sounds, because that would be a huge hastle with all the graphic sets.

But we'd probably need a few more people to chime in... or even better have a poll about it?

I'm asking out of curiosity, because you've raised this point before and it doesn't tally with my experience. Other than conversions of older content, what packs are there that artificially restrict themselves to the classic 8 skills? I know of one (Lemmings Migration), which is hardly evidence that there is a general trend. Are there others?

Well, to be fair, since I announced I would give those older packs an obvious "free pass", I think most of them would qualify for that because they are indeed that old. For example, I know that Nepster's "Return of the Tribes" is even older than NepsterLems, so obviously it only has classic skills, too - even though a pack alluding to Lemmings 2: The Tribes feels much more like it "needs" NeoLemmix skills compared to e.g. Lemmings Migration.

I looked back at when the Lemmings Plus Series started using NeoLemmix skills, and as far as I can tell, it wasn't until Lemmings Plus IV. Of course, I wasn't around at the time those packs were created, so I don't know whether namida made them in Lemmix first, or whether he had already set up NeoLemmix but hadn't introduced any new skills yet.

For packs converted from SuperLemmini, like SubLems, it's also obvious that they don't have NeoLemmix skills. And for the couple of levels Arty had to swap out because of certain skill behaviours that exist in SuperLemmini but not in NeoLemmix (like "Lemmings can't jump"), it wouldn't have made sense to introduce new skills just for those. Just like I didn't want to replace my radiation/slowfreeze levels in Lemmings World Tour with Shimmier levels in New Formats.

Then there is also Lemmings Stampede, although again, I don't quite know when it was first created.

Just in general, when I joined the forums, it already had had NeoLemmix skills for a while, yet most of the "current" content at that time (i.e. the packs held in high regard and recommended to others) still only featured the classic skills. Lemmings Migration came out new at that time and went into the same direction. I think it wasn't until I played CasuaLemmings that I encountered a new pack making excessive use of the new skills. And it wasn't until SEB Lems that a really challenging pack with new skills came along. At least that's how I remember it.

Now in New Formats, there are fortunately already many more packs that use NeoLemmix skills.

However, in my post I was specifically referring to X-of-everything levels. And so far, most packs I've seen that feature them do so in a "X of every classic skill" manner. This is true for Lemmings Plus I-III and NepsterLems above all else. I haven't seen a lot of X-of-everything levels than include NeoLemmix skills in the same quantity as X.

Maybe because we haven't even agreed yet in the first  place on what "everything" means when more than 8 skills are available .
I'm referring to both the increased panel size (from 8 to 10) and the increased number of skill types (19 as of now, hopefully 23 in the end) here.

Ah yeah, thanks for adding Amateur 31; I had indeed already downloaded all your replays, so I just added this single one.

Plus the New Formats version actually has a save requirement, and so I will have to play it anyway.

Well, that's namida's fault, not mine; at some point, for some reason, he decided to make the minimum save requirement in New Formats 1. And I've already complained to him how he partially ruined this otherwise completely indifferent level with that!

brutal difficulty of some of the levels in the main ranks, especially the Legend rank, the final main rank of the pack.

Really? ^^ "Brutal" is a word I maybe would have expected for some levels from Lemmings Open Air, not from this pack. Maybe that's because IchoTolot seems to have breezed through this pack quickly and easily, so that I had already given up hope that any of those levels would pose an actual challenge to adept solvers such as you and IchoTolot.

I don't quite remember which of the Legend levels you considered the hardest, but maybe I'd have to check those specific levels again to see where you're coming from.

As for the final level of the pack: Yeah, that took IchoTolot one hour as well. It's not necessarily for difficulty per se; it's just because there's so much stuff to cover.
In the end, I'm probably happy that the New Formats editor has a pixel limit, so that I can't even be tempted to ever create such a monster again.

"The Grand Puzzle" was my first attempt at creating a Final-Frustration-like experience; in Lemmings Open Air, "Hammer-Smashed Face" is my second one.
Interestingly enough, Lemmings: Hall of Fame actually does not end with such a huge open-ended level.
But Lemmings, Drugs, and Rock 'n Roll might... and hopefully, that one will be much better at a much smaller landscape size.

When I do do this, should I do it post-commentary like I'm doing with United? Or should I just LP it as if from complete scratch? Even though it's not really, since it will be a non-blind LP like you said since I've already seen all of the levels. Come to think of it, I notice how very quickly I tend to forget my own solutions to other people's levels, and so I might just do the former. Then again, maybe doing the latter is better and makes for a much more enjoyable experience for both me and the viewers, especially a pack author such as yourself IIRC the longest I have ever struggled on a level in this pack was probably for a good 45 minutes or so, although I think the final level was close to an hour.

Well, if you really actually do forget your own solutions again quickly, then this might be the best chance you have to do a semi-blind LP. In other words, just running the replays over the levels with post-commentary might be a wasted opportunity. At least as long as you're not really getting stuck - which I think both of us would have good reasons to doubt, now that you've already solved the entire pack in Old Formats.

I might still do a creator's commentary later, where I can run the replays with commentary... or IchoTolot might upload his solutions for New Formats to YouTube eventually. (Which would then be the same format in which you're planning to LP the pack, so if you're both just running the replays over the levels, it would be a very similar experience for the viewer, therefore most likely redundant.)

11 failed, some due to the glider issue, others for various reasons, most notably due to the ceiling being deadly in New Formats, while another 14 is undetermined (see my attached mass replay check text file for v12.10.0). Curiously, for v12.9.4, there are more problematic replays (mass replay check text file for v12.9.4 also attached). In both cases, it reports as Diva 24 not being found, although I ran my replay and it does work, so no problem there. However, it reports an error with Groupie 39 due to the generalstratomd style missing.

- The Glider physics change was indeed only implemented in New Formats, so yes, all those replays will fail and did so for me as well. Sometimes I had to adjust the position of an updraft in a New-Formats level but had to deliberately not do so in Old-Formats.

- Diva 24 is a rerun of Noisemaker 15, so maybe there was an issue with the level IDs in the replay files? I remember I didn't quite know about the issue with identical level IDs back in Old-Formats, so whenever I created a rerun out of an existing level but then later on manually gave it a different level ID, replay files I had created before that would end up getting confused.

- Groupie 39 isn't the only level to require the strato_generalmd style; it's also needed for e.g. the level "Weiße Rosen aus Athen", for my custom white flower traps, and for the level "It must have been Lems", with my custom Builder staircases pre-placed inside the level.
So if you don't have that tileset installed (even though you should, since it ships with the New-Formats download), those other levels should have produced error messages as well.
Maybe you downloaded the styles together with the pack, but they didn't get unpacked into the right folder?
If you unpack the ZIP into your main NeoLemmix 12.10 folder, the levels folder should automatically get integrated into your levels folder and the styles folder into your styles folder. If however you unpack them directly into levels, then the styles will end up in the wrong place.

Yes, that is one possible backroute to "Microcosm". I guess I will eventually have to enforce the 2-Laserer solution and cut the Spearer from this particular level.

"Thus spoke Zarathustra" was solved, as feared, with just one worker lemming instead of two. However, this is only possible due to the high ramp, which is needed as long as we have the current Slider-Swimmer behaviour. If this is changed, I can lower that ramp. If now, I'll have to dent the ceiling in such a way that you can't jump off the ramp to reach for the ceiling.

Have you seen my level "The Creation"? It wasn't in your "Strato Exp Skills levels" ZIP. And that one should definitely need the Spearer to work.