I need to turn that around and ask what advantage there is to using Windows locally.
No maintenance today means a frozen system and that's not realistic. MS insists on you performing at least the maintenance of selecting among and installing its perpetual updates which occasionally, in my experience, require much deeper maintenance of other parts of the system. There are many people who simply do not want to ever see all that including the user base I am considering. I just can't see eliminating it as added complexity.
An easy to use cloud service presenting an affordable virtual Windows (or Linux or Android or whatever) machine can in theory completely shield you from system perturbations while still allowing you to install the apps you want and deal only with their requirements which are rarely more than clicking on "yes."
The gain is a low cost box that's just a proxy user interface and host for gozintas and gozoutas that will be able to act like either what it really is or whatever might be in the cloud it can connect to as a thin client. Windows is only one such option. It's a potential simplification without loss of generality. A hardware device that's just a thin client can also have a very long lifetime. Much longer than today's complex systems. This is also of very strong appeal to the base I am primarily considering.
As an anecdote, I was in Costco today and browsing their laptop selection. I stopped at the HP Chromebook to play a bit and a couple of women in their 20's came up behind me and I heard one say, "Oh, that's only one of those Chromebooks." Remembering this conversation I took the opportunity to quickly lay out what it can do plus my view of its ultimate use as a general purpose thin client and the immediate response was an enthusiastic, "Wow, I'll never have to buy another machine again and I'll still have everything I use now when I want it. That I like." That's young folks, not the geriatric set I've been pondering (and a set of which I am no longer considered a junior member.)