Windows is still on my gaming PC, mostly due to anticheat issues with games like Hunt, Destiny, and Battlefield. I'm finally able to play games like Crusader Kings 3 on my Linux laptop without any issues though.
No one cared about the "non-nerd" until these two came along. Because sure "you can alway select <one of thousands distributions> and <build/compile/config your own stuff>", but this doesn't scale.
Even if this started as a way to keep being relevant in the world of competing OS-level stores and shenanigans (IIRC Steam for Linux started shortly after Windows Store was announced), the achievement is still nothing short of miracle: there are actually games you can play on Linux now.
For a long time, playing games on Linux wasn't a "nerd" thing, it was a "nobody" thing. Getting AAA games to run on Linux was a pipe dream.
Valve has put in the work (and in some cases, hired the people putting in the work) to get us to today, where most games work with decent performance (the major exception being anti-cheat, but Valve is slowly working on those as well).
Quoting myself: "the achievement is still nothing short of miracle" ;)
I (use to) play daily so there was no point ever booting up into linux.
As soon as linux support came out, I started playing under it immediately, and quickly realised that there was no point booting up into windows anymore.
I have played some games on it and mostly it is parasite apps like EA App or whatever that is a problem.
It Takes Two worked great when running but lunching was always 5-20 minutes of restarts. And two times out of like 8 EA bricked their launcher app with updates and the game stopped working for some days.
The next gaming rig will surely be Linux only for me.
I am not accusing EA of caring about my Linux gaming experience. But I still blame their app for making it worse for their games they distribute.
Apple did it way back and valve just updated to support 64bit for macOS.
The jump from https://i.imgur.com/dGOw1G4.jpg
to steam (2019!) https://i.imgur.com/H5QYFbz.png
was incredible. My Linux box has the 'good' CPU/Video card these days.
I have never had Windows computer. Moved right from DOS to Linux around 1992. And I gave up gaming after DOOM/MYST in 1990's because there was nothing new happening and hardware requirements were excessive.