Is it just / ?
I kid. But really, besides “its all a file”, if you take away the gui, is the only difference the syntax ? How libraries interact? How disks are mounted ?
If we stripped all ms’s junk out and made windows open source, would we still prefer linux?
When you get to a very basic level, is one of them more efficiently coded?
It’s already been made perfect once. What updates would you make it divinely inspired code?
I wouldn’t update a thing. I would pick and choose the parts I like when I like them.