It's amazing what Valve has done for Linux on the game front. I switched to Linux in 2005, and back then it was so bad, you practically had to dual boot to game. When I stopped dual booting, and went heavy with custom Wine configurations for each game, it was still like a walk in the desert.

Now Linux gaming is absolutely amazing IMO, maybe not quite on par with Windows, but sometimes it actually works better on Linux for old games, because compatibility with old 32 bit Dos based Windows, is better with Wine or Proton, than using original Windows later than Windows 98.