It would cost me about $700 - $800 to buy new copies of these.
Well, Microsoft wants to help all of us stupid people who haven't switched over to Windows 10.
This all has to do with automatic updates.
If you have Windows set to automatic updated, and you DO NOT want it to start the Windows 10 update process, then you had better change it real soon.
My system has auto-update turned off. I review the available updates and decide what I do, and do not, want.
Sometime after the start of the new year, Windows 10 will be downloaded to your computer.
It will, supposedly, wait for you to confirm the install.
QUESTION: Right now, how many of you see a notice that Windows has downloaded, and is about to install, an important update?
Welcome to Windows 10 if you accidently click on the OK button.
Windows 10 will be made an automatic “recommended” update early next year
"Microsoft says its number one support request is people asking where to get the upgrade."
Really

"Then, early next year, it will be categorized as a "Recommended Update."
"This is significant, because it means that systems that are configured to download and install recommended updates—which for most people is the safest option—will automatically fetch the upgrade and start its installer."
"The installer will still require human intervention to actually complete—you won't wake up to find your PC with a different operating system...."
Unless you hit that OK button automatically, as you probably do for most updates.
Unlike some, I have nothing against Microsoft. That may change.