there is virtualization so you can run windows on it and work with those pesky proprietary softwares, but yeah performance will never be better than running things directly (except games with shitty directx implementation that run better with dxvk, ie sekiro, elden ring), albeit it can get really close. If you're into tinkering, this will not be a problem.

on that topic, I was considering giving cassowary a try since my partner uses some windows only software too, looked promising.

then there is the game problem, but really, unless you play something that uses anticheat that doesn't support proton, you're good to go.

I've been gaming on it for over three years now.