Yeah I have been down that hole too it’s mostly all the online logins and sessions that I have collected over years of using that os(windows) and pc and some old data that I don’t really want to wipe but also don’t really wanna go through the hassle of copying the important stuff off of windows.
Also some of the games that I played used to have such obnoxious anti cheat systems that I couldn’t imagine the hassle to get them to work to be worth it but thanks to the steam deck adoption has increased immensely since I last tried gaming on Linux.
Wsl2 doesn’t quite do the trick for me it just makes me want the whole package but I use it for programming because I don’t know windows shell commands for shit and everything is tied into windows/ms at work^^