NixOS and Guix are both very beginner-unfriendly. If you’re not very comfortable with Linux and its command line, I’d recommend against using them for personal systems.

I think it’s referring to the driver version 570, which isn’t stable yet but working fine in beta.

I use Wayland with Nvidia (proprietary beta driver) every day (including for applications running over Wine) and have no issues.

So while some may still have issues, I certainly wouldn’t call it “completely busted”.

same with vrr