The registery is much easier to break, much harder to debug and much harder to fix, UNIX config is more human-friendly, I’ll never mess with the registery again

Not even close, Proton is a translation layer from Win32 API to whatever works similar for Linux, SDL just gives a higher level API of lower level stuff, like instead of using Xorg/Wayland directly, you get a nicer cross platform API that does the job well