For reasons relating to the possibility of styles using V12.11 features not working properly on older versions, Style Manager support for older versions will be discontinued after V12.11's stable release.

From the time V12.11 stable is released - any new style updates after this time, will only be downloadable in the Style Manager when using V12.11 or higher. The Style Manager in V12.8 to V12.10 will continue to work, but will not receive (or detect in the update check) any updates that were made after V12.11's release.

From a few weeks after V12.11 stable is released - the Style Manager will no longer be able to download styles when using NeoLemmix versions prior to V12.11. Manual downloads of V12.8 versions of single styles will also no longer be possible (but the all-styles zip will remain available permanently).

This arises from a forwards compatibility issue - that older versions of NL might not handle newer versions of styles properly, not the other way around. As such, to be very clear, there is nothing you need to do in your styles to accomodate this.