Additionally, what changes are necessary for you to be able to use Linux full time?
Define “serious gamer”. I play almost everything on Linux with little to no downsides, especially in Dota2 and CSGO or single player games.
I would guess a “serious gamer” is one who wants to play all the latest AAA multiplayer games. Just not possible for Linux to work for 100% on Day 1 with the ridiculous kernel-level anti-cheats.
For me, even though I play mainly on Linux, the issue is with random niche mods or hardware; Tobi eye-tracking, headtracking, VR.