I started playing a year ago (also on Linux), I never felt a lack of players to do anything, be it recent or older content. As for performance, from what I can compare with my friends, its runs at about 90% of windows. It’s free to play the base content, give it a try!
Man that game is a damn masterpiece
Nowadays I just play something else, so many games out there that work flawlessly (thanks to wine/proton). I also did virtualization successfully for some time but it can take a while to get it right. The best and simplest solution is to get a separate SSD just for windows and dual boot.
In-universe, creating that show was a genius move, if anything legit leaked they can just say it’s some fan fiction from the show and not from the real Stargate program.