@ David 132 Re: Paying for Windows 10 after July
"I don't think they will suddenly switch existing copies of Windows 10 to pay-as-you-go."
Yes. Your analysis is cogent. It won't be an abrupt "pay or die" transition, but it will certainly follow the boiling-frog principle, charging nickel-and-dime for this or that "extra feature", slowly but inevitably leading up to a full-on monthly ransom.
The other side of the coin I suspect will be that if you don't pay, your computer may not be locked down, but you will be constantly nagged to "upgrade to premium", your computer will be ransacked for useful information to sell to advertisers and LEAs, and you'll be endlessly bombarded with unblockable ads on the desktop as well as in every application you use. Want to get rid of the ads and spying? Pay up, picknose!