You've probably heard of the state of Mac gaming, if you've played video games much at all.

Linux has twice the number of active Steam users as Mac, with probably very nearly all of them using Proton to some degree: https://store.steampowered.com/hwsurvey/Steam-Hardware-Softw...

Personally, I've actually had noticeably better compatibility on Linux with older games, compared to Windows. And every single one I've been interested in for the past several years works flawlessly on it. (I don't enjoy most AAA games, so my sample is definitely skewed, but it's a fairly common result)

You, a developer, just happened to not know a very well known software. This fact is not as meaningful as you believe it is.