It can be a slow transition, but I did the same. I had equal space for Windows and Linux in 2017, predating the Proton years. When I built a machine in 2021, I saw how much I was using each OS, and it ended up being 1.5TB Linux and 500GB Windows. Whenever I build my next PC, I’m quite confident I won’t have any reason to use Windows at all, seeing as I haven’t even booted that partition in about a year. If there is some odd use case, like a firmware update utility for a peripheral that requires Windows or something, I’ll just install Windows briefly on a cheap mini PC I’ve got and then set it back to Bazzite when I’m done.