Be wary of GPU drivers. AMD used to work fine, but nvidia can sometimes get wonky and either make booting slower than it should be or just outright break your X server. But overall games work super smoothly nowadays with Proton, and you can even run non-Steam games with it.
And if you're not acquainted with it, the Arch Wiki is always useful, but specially for arch-based distros like that one.
It's one of the window system on top of which gnome or other desktops run. But I misspoke there, what usually got messed up was the display manager, specifically lightdm.
But if everything is running fine I doubt you'll have any future issues. Just remember to check nvidia-smi in case of FPS drops to see if the game is using the GPU.