I really don't know a lot of people who feel confident doing a macOS update. The thing borks everything so often it's not even a meme, just a fact of life so people I know tend to be super careful with it and only update when the apps they use start dropping compatibility for older OSXes (or when they buy a new mac :-)).
I’m not going to deny there are issues with the Mac (or iOS) platform, there clearly are, but let’s keep it honest. While we’re at it, let’s keep it honest about other platforms too.
Have multiple macs and use them for both personal and work use.
I don't really have an hour to dick around during working hours and I don't want to leave my machine on overnight (or if I do it's because I want it to be doing something). So I almost never update.
IME it doesn't break as often as Windows; but Linux is "best" here, updates are in the single-digit minutes.