If you use steamdeck I'd check out bazzite. You can use the deck image for your steamdeck and desktop image for PC and then you won't have to worry about big differences.

I switched to Linux about 2 years ago now and its been fine. The only games that don't work are ea games like battlefield or Activision like cod

I don't really like to mess with it so I just use the default settings on almost everything unless there is an issue then I check protondb to see if there are any solutions, usually all you need to do is go to the game properties in steam and select for use a different version of proton and it runs fine