These two clauses are of concern
• Updates are cumulative, with each update built upon all of the updates that preceded it. A device needs to install the latest update to remain supported.
and
• A device may not be able to receive updates if the device hardware is incompatible, lacking current drivers, or otherwise outside of the Original Equipment Manufacturer’s (“OEM”) support period.
If, as has been stated previously, this is the last release of Windows it effectively means that unless and until they develop a completely new product not called Windows then Windows 10 will continue to be subject to new builds at periodic intervals. At some point devices that were upgraded to Windows 10 but were older platforms yet still worked (had a few surprises myself as to what were successful) could well no longer accept new builds. The fix to that would be to roll back to the earlier build and continue with that.
However the 1st clause requires that latest updates are required for support so anything that cannot run a new build automatically ceases to be supported.