I just switched from Nobara to NixOS on my gaming PC. I’ve had NixOS on my laptop for almost a year and decided I’m comfortable enough with it to use it full time, and it works great for gaming.
Before NixOS, I was a die-hard Arch user. The only reasons it would break were because I was trying a bunch of stuff from AUR to play around with Wayland + Nvidia when that was brand new, or when I would forget to update for a while.
It breaking was primarily due to me tinkering around and not fully undoing those changes. Now I can do that with no fear on NixOS, and it’s fabulous.