I have a secondary drive with windows installed, in case I ever run into a game I need it for but I have yet to run into a game I want to play that doesn't run through wine. I guess it's because I only really play single player games and nothing with funky anti cheat, that's usually where compatibility issues happen.

Linux gaming is getting really good with Proton or Proton-GE unless it's a rootkit like Valorant or an online game with anti-cheat (Destiny, FF Online). I play mostly single player so it suits my needs. But I have a windows 10 install for audio recording needs... I don't have time to learn a new DAW.

One more thing, dual booting on the same hard drive is more trouble than it's worth if you have any other option.