Unfortunately, 100% parity will likely never happen, especially if people wont just use it regardless of less than perfect compatibility. Devs keep making games with functions that refuse to work on linux and/or refusing to support it or provided compatibility layers, and windows keeps breaking shit that old games rely on to work making linux compatibility with old titles better than windows.

just depends on what you're trying to playing. personally I almost never play any multiplayer games any more and I dont feel like im missing out on anything. i've been daily driving linux for a few years now and leaving my reliace on windows in the past has been very nice.

just comes down to your priority, I suppose. my priority is my system first, games seconds. If your system is games first, system second, then linux may not be for you yet.. but I would still recommend learning to use it, be familiar with it should the time come that microsoft does something that is an absolute deal breaker for you.