"Windows 10 is a worthy upgrade"
Oh FFS Win 10 is not a worthy upgrade it is bait.
Why would Microsoft suddenly decide to give away one of its main cash cows for past decades? Not just give it away but desperately attempt to ram it down people's throats?
Because it is bait and when enough morons (like the article author) are hooked they will switch and the morons will start paying.
Morons running Win 10 will be paying for it one way or another and likely be paying more than for any other version of Windows.
Smart people would just say NO, but, the morons have us out numbered so Microsoft will probably get away with it.