For my next pc I’ll use linux

Check my post history but that's pretty much my #1 transition recommendation : do check that your future hardware is actually compatible. Most is... but you don't want to risk it when it's relatively easy to check!

PS: if you can, try to buy from manufacturers that do NOT sell a PC with a Windows installation. Ideally do buy something pre-built, try to give money to companies that even do ship with Linux installed. It's economically and morally nicer but also insure that your setup will 100% work.

When you have a new PC, put it on the old one too. You could run a Jellyfin server off it it or use it as a NAS device or something.

I think adopting Proton was the smartest thing Valve ever did. They are going to capture 90% of gamers switching from Windows to Linux.