There still a performance delta of about 30% vs windows for some of my games.

I know Proton is often touted as the magic beans that evens out performance between windows and linux systems. But most games will likely still perform poorly on Proton compared to WIndows native.

So the question is. Does this performance gap matter in the games you play? If I can still play and have fun playing the game, then it would not matter to me. If you play competetive, where that performance does matter, then stick to the system that has better performance. Even if it might be Windows for some games.