You'll notice there has not been any new versions of Windows in quite some time, just updates. I think the idea is, get as many people as possible on the platform and that's less overall hotfixes and updating that need to be done. I mean think about it. Supporting XP, then Vista, then 7, then 8, now 10, that's alot of work rolling out fixes for each one. Granted XP, Vista, and I believe 7 (if I'm remembering correctly) are now at end of life and no longer supported except on the enterprise platform. This leaves them open to do more cross platforming for other devices like phones and tablets and what have you. It's all about making money, and just selling you an OS isn't where the money is at any more. It's in all the other BS they wanna ram down your throat. But, I guess that's the way of the world.