This ship has long, long sailed. If you don't spend your all your 24 hours as an office worker using Microsoft software, or you're locked in with a PC from 30 years ago, chances are almost every single UI you use will look differently, besides some microscopic agreements, like back button or a burger menu.

We just got used to it. There is some very vague thin layer of "commonly accepted patterns and symbols", but otherwise users just get through it.