It's not perfect, but thanks to Steam Play/Proton it's becoming viable, I've played several high end "Windows" titles on Linux through Proton (modified Wine), and then others like Tomb Raider have native ports. DOOM 2016 runs better on my Linux box with Vulkan than it does on Windows, where it averages 100FPS/4K/Ultra vs ~60FPS in Windows. I'll be honest, _what_ I play is more driven by what's available now than it used to be, but I'm not much of an online/multiplayer, I prefer single-player so there's no huge rush and I have a back-catalogue that'll keep me busy for years to come, with more being added faster than I can play them.

It obviously depends on what you're playing exactly, but many titles (from indie to AAA) run great on Linux, either natively or through Proton (Steam's integrated Wine distribution with DX11/12 support).

Never used the Epic Store or Origin though, so cannot speak to that.

With Valve (steam) involved and wine much improved, it is a thing now, but you are still very limited compared to windows.

Linux gaming has come a long way. Steam even has a fork of wine they are working on which is built into their client.