Incredibly unlikely to happen to home versions. MAYBE “pro” could be subscription, but I assume this will be a paid support model instead.
Because Microsoft’s market share comes from everyone pirating copies and getting free copies from university. It is the same reason Apple has so many discounts for students and position themselves as “required for art”
Because when those people enter the corporate world? It is easier to support the OS that people sort of know how to use and like.
So yeah, there is almost zero chance of consumer grade windows requiring a subscription. And any outlet that would even entertain the thought mostly shows itself to not understand the market.