|Microsoft cuts off Windows 10 support early for some PCs. An entire generation of PCs, most only three or four years old, are now unable to receive new feature updates to Windows 10. If Microsoft doesn't deliver a patch within the next six to nine months, those PCs could be cut off from security fixes|
The bottom line: If your PC was originally designed for Windows 8 or Windows 8.1 and the manufacturer doesn't officially support it for Windows 10, you're at risk.
For the short term, at least, this policy shouldn't affect PCs that were designed for Windows 10 or for which the manufacturer has explicitly delivered support for Windows 10 in the form of drivers and firmware updates. But that could change in a few years, perhaps without notice.