Today's Windows 12 is tomorrow's Windows 11. Even if the teams change, the environment that produced the current team will remain -- it was game over the moment Windows OS fell from money maker to cost-center.
With that being said, what kind of change would "save" Windows? From an organizational perspective, a spin-off would be most effective... albeit the least likely. If we take that off the table, the next best thing would be to retool the product so that it scales better for such an unwieldy organization. I'm talking a new kernel that's compact and totally modular... but good luck dealing with that can of worms. It all circles back to Microsoft as a corporate entity -- what's good for the goose isn't good for the gander.