As a coincidence other day I resized my desktop's win10 partition, installed PopOS taking care to make my own partitions instead of the default clean install, and found a guide for steam, protonup and lutris. I think a lot of the steps would trouble folks that haven't used Linux extensively before. Dualbooting, pip as a user not root, flatpak vs deb, saving some Nvidia settings elsewhere, and I still can't figure out why my identical second monitor doesn't display anything until I change the resolution once after boot (Nvidia, working one is dp, other one is HDMI if anyone has ideas)... but overall I'm impressed with the few games I fired up and they just worked. Good stuff Valve. That was not the case last time I tried.