Plenty of video games that will not run on Linux simply because of stuff like anticheat. Like Apex Legends (ran fine for a while but got blocked again recently) and Valorant, just to name 2 I’m personally aware of that’s stopping some of my friends from going to Linux.
You can say that dual booting would fix that, and my bf actually does that, but that’s obviously not a workable solution to the vast majority of people.
As long as games like that won’t run on Linux it’s simply impossible for a lot of people to switch.
No issues with Nvidia for me on arch. The drivers are fine and there’s even a cool Linux version of shadowplay if you use that.