"The problem with foisting an update on unsuspecting users is many wonder what broke..."
Why mince words? There are *definitely* devices out there that have driver support for Win7 but not Win10. (It is really rather common with printers and scanners, despite the fact that these are exactly the sort of devices that should be just a user-space protocol layer over a standard USB link.) If you forcibly upgrade everyone, you *will* deprive some of your users of the use of some of their hardware. It is really only a matter of time before the lawyers get involved.