Windows 2000 to XP to Vista to 7 were big breaks in UI. 7 to 10 was a break. 10 to 11 was a break. When I now click the lower left corner, weather opens. When I'm pressing the Windows key, no applications menu to be seen, just some web search slop.
The only thing that's constant with windows are the lying percentages, where 99% and 100% take as long as 0-98%...
Unless I'm misremembering, Windows key still opens the start menu with your apps. It's just that they added tons of adware and crap next to it.
Windows updates are a support nightmare. It's just that everyone accepts those and forgets about the pain they cause. Whereas some tiny change in Linux desktop environments is always a catastrophe when people tell about it.
Microsoft gets a free pass beause of Stockholm Syndrome I guess...
I would totally use Linux on desktop if I didn't have a Mac. But it's only because I'm stubborn enough not to tolerate Windows treating me like dirt, not because it's actually a rational decision to use Linux.
There has to be some acceptable default that doesn't change too much, even if it's not the best thing ever. Ubuntu changed DEs twice even though the original was fine. Windows UI is intentionally bad at this point, but at least it's stable.