The CPU on most machines is quite proprietary. I don’t understand this faux purity dogma.

Practical computing is not and never has been an abstract pure concept. It’s about making machines built by corporations to do usefull things at scale.

There is no ”non proprietary” computing unless you make your own stack.

If you're going to make apps in windows, you need to call their proprietary API somehow. Maybe you do it via a wrapper library, or via electron or something. But that's the same thing, just with more indirection.