Well nowadays I'm stick with macOS not because it's pretty, but because a necessary to do my work as a mobile app dev.
But there's also a decent chance a game won't run at all, and when performance is actually a problem, an even better chance that Windows-specific performance optimization tips will be more readily available than Linux-specific tips.
Given that games almost universally have their own immersive user interfaces, and therefore require minimal interaction with the host OS, it's hard for me to justify running Linux on a dedicated gaming PC.
Gaming on linux is feasible, but it’s not hassle-free and we shouldn’t skip the fact that it still requires some effort. A cheap cost to free oneself from Microslop, but a cost nonetheless.
I'm sure there's some long tail of titles with poor support, but how many people are actually playing those?
For me at least, Elden Ring on launch day worked flawlessly, anti-cheat and all, on Linux without having to do anything other than adjust settings in the game (which I needed to do on Windows too) and it ran better to boot!
Just check ProtonDB’s aggregates. Of all the Steam games with reports in the DB (~10% of the entire Steam catalogue), 30~60% (tier 1/platinum) are likely zero effort setups, 30~40% likely require some work (tier 2/gold), and the remainder will most probably do or not run at all.
Things have improved, are improving, and hopefully they’ll keep doing so. But we need to practice some degree of expectation management, especially given influx of new converts these days…