The hardest part I think is working and sharing work 2 different systems at the same time. Not that the technical solutions do not exists, but muscle memory will always make that one system end up feeling unbearable and it might not because it is worse but by resistance to change.
In the case of UI/UX, I don't want this.
I use Windows because it's not MacOS. I absolutely hate MacOS. Microsoft UI/UX designers using MacOS as inspiration is a critical bug, not a feature, as far as I'm concerned.
I want my taskbar to show labels. I want multiple windows of the same app to be a separate item on the taskbar so that switching between multiple windows of the same app is a single click. I want each window to have its own menu bar, rather than a single menu bar at the top. I want a taskbar on each monitor, each showing only the items on that monitor.
Windows 10 has all these as an option. If Win11 is imitating MacOS, all those go away.
This discussing thread is getting lost in the weeds.
We were talking about people <<designing>> Windows.
For sure they should be using it, <<day-to-day>>. They should feel the same pain as their users are feeling and they should want to improve it.
Anything else is a travesty and that's how you end up with enterprise software (designed for the CEO, used by the peons), or Android apps (designed for iOS by people with iPhones, used by peons on Android).