I played WOW under Linux since open beta of WOW 1.0 until the first expansion, after which I quit it. The performance probably wasn’t on bar with Windows, but besides some problems after some of the patches, the stability was rock solid even in 25-man raids.
https://www.gamingonlinux.com/steam-tracker/ has some statistics from the Steam Survey. Somewhat interesting bit is that if you only take users who use English as the language in Steam, the Linux market share is 6.3%.
Hackintosh is a thing (or at least used to be), but it’s against the EULA.
In Finland, Linux market share has jumped from 4% to 24% within the last 6 months.
Tuxedo has one all-AMD laptop with dGPU.