"Therefore Microsoft will offer enterprises two kinds of subscriptions which offer the latest features as soon as their stability has been proven"... I doubt anyone wants to deal with a "subscription" to an operating system. Either you have the OS, or your don't. No wan wants to pay for the exact same thing again and again and again.
My advice for everyone: pay for it once, or don't pay for it at all. Multiple payments is a guarantee of the presence of DRM. There are always other programs that do the same thing without subscriptions or DRM.