I’m using NixOS and I have had no problems gaming. Getting the kernel from CachyOS is also easy enough, if you want that.

They’re in the process of doing so, and they’re a long way off from being finished. Frankly, I doubt we’ll ever see a release.

Heroic is great. Bottles has the potential to be great but it needs umu, and I’m skeptical about them rewriting the project (rewrites are seldom a good sign of a FOSS project in my experience).