Some caveats as someone who games on Linux (Wayland, so YMMV):

- lack of HDR support

- anecdotal micro-stuttering in games like CS:GO ...

- .. and 4:3 aspect ratio does not work

- many games require command line tweaks to start or work properly, including but not limited to; overriding binary paths to skip launchers designed for Windows, changing your GPU driver (RADV vs AMDVK), enabling features like DXVK_ASYNC (might make an unplayable game playable)

- you need a nightly mesa-git to play new games

- anticheats in most games are broken

- Steam requires a kernel with 32-bit emulation support to run, and has a lot of dependencies on such software

- you most likely need a GPU from AMD

Other than that, it's quite good! Software like gamescope is a real highlight, allowing me to toggle FSR even in titles which do not support it. This evens the playing field between Windows and Linux, and might even make it even! I removed Windows and beyond occasional FOMO on Tarkov and Call of Duty, I'm happy.