I think it used to be a good thing and people actually like the update. But now they got update fatigue, mostly because updating aren't exactly a smooth process and doesn't actually add any value to their usage.
They should go back to the old style where major OS update happens every two years. Although I am not sure the current Apple understand this.
That's me, I don't care.
I could, and someday will, install a custom ROM, but for now, shit just works.
I know people who are actually annoyed but the update notification...