I use Linux exclusively for gaming. Sometimes there's a performance hit or weird bug, but mostly it runs very well, occasionally better than on Windows. I have quite often heard of windows players complaining about older games no longer running properly, and I've often had no problems with these on Linux, for example the original Dead Space.

However there are technologies which are still quite some ways off. Rtaytracing is improving but still a generation behind windows in terms of performance and support. HDR is barely supported anywhere. Variable refresh rate, is supported in some instances, but not universally, e.g. Gnome doesn't support it yet for Wayland. I don't know anything much about VR but would suspect it may not be very well supported yet either.