Well, it’s big and great relative to what it used to be. But it’s still pretty limited compared to Windows. As an example, about 40% of my Steam library runs in Linux natively or officially supported by Proton. Another 20% runs ok enough through Proton, though not officially supported. That leaves 40% that I’m rebooting to windows to play. And, of course, that game I’m most playing right now is one of those.
60% of my library running in Linux is amazing compared to what it used to be, but still isn’t enough to convince a serious gamer to switch.