I'd venture to say 99% of people don't give a damn on what their os is. All they care is to run their apps without the os getting in their way or breaking. They don't feel the need to and don't want to be forced to tweak, customize, fine tune and manage that os a lot.
I'll go even further and say that most people, even younger people, still think in terms of "computer" and not OS, like it's an appliance. It's about as sophisticated an understanding out there as it was in the 90s. When I'm asked for computer buying advice, they ask me "Mac or PC?" or maybe "Mac or Dell?" For phones it's, "iPhone or Samsung"? Eyes would glaze over if I tried explaining that Dell, Lenovo, HP machines etc all run Windows, except the ones that are Chromebooks... and I would never EVER recommend Linux to a normie unless I wanted to forever be their tech support.
