What makes stuff like the [X] button on the corner and Alt+F4 intuitive?
Multiple years of having used MS Windows and similar looking software as a student.

They got the marketing part right here, at least.

But if we are being inclusive, nothing really is intuitive.

I have seen BTech graduates struggle with installing software using the Wizard that is so omnipresent on Windows, so I don't expect anything to be intuitive at this point.