best hope for mainstream adoption
I feel for that the default Linux DE will need to have an UI closer to Windows, due to user familiarity with the traditional desktop metaphor. Maybe Cinnamon or even KDE are more suited in that respect. Neither need hours of configuring either. Personally, Cinnamon with Wayland support would be perfect for me (and I suspect a whole lot of Windows migrants as well).
Gnome is nice of course in it’s own minimalist way for many,but the workflow is very different from other OSes and I think many find it too minimalist requiring extensions to improve usability therefore. However, there isn’t a stable mechanism for extensions causing breakages between versions, which can be very irritating. I don’t know if that’s now changed now though, because I have been reading about a major change in the extension mechanism in Gnome 45.
It is indeed a new thing. For the reasons you’ve mentioned this was an option for enterprise customers for earlier versions of Windows as well, but this time they are making the option available to home consumers too. I can’t really see too many people paying for this though. Those who care will move on to Windows 11 (or whatever is out there by then) and others will simply keep running an unsupported / not updated OS. In all likelihood, MS will keep providing security updates for the latter for free in the end.