I personally enjoy changes of scenery, but my parents struggle to relearn how to use their computer every time there is a major OS update that revamps the UI. It's seldom better, it's just change for change's sake, resulting in a lot of time lost to relearning. Sticking to the old OS is only viable as long as security updates continue.

I wish that OS developers would provide the option to retain the bulk of the old UI when a new one comes out, implementing the UI like a swappable "theme." People who prefer consistency could keep most of their old UI, and those who prefer the newer UI can have it.