With many of the current Minecraft modpacks, Optifine breaks client and causes crashes.
Many of the reports we get about bugs or crashes are caused by optifine, and we have to treat them all.
The idea would be to add button or slider when creating/modifying a modpack to allow or not Optifine. If it is not allowed, CurseForge would detect it in modpack files and prevent the pack from being launched, telling that Optifine breaks the modpack. It would save a lot of time to Pack Makers, and help us a bit with all our optifine related reports.
Hear me well, this is not to limit player's freedom. If Pack makers want to let it enabled, they can. But for those who know that Optifine breaks their pack, that would be a neat feature. At the very least, if you find that it limits freedom of choice, we can at least put a warning message warning for the presence of Optifine. As well, opt-in/opt-out by Pack makers.
Thank you for your attention !