Down the legal rabbit hole?
MS have shifted the goal-posts after the game has started - The system requirements for "Windows 10" are now *not* the same as they once were. So what legal standing does one have now that their system, which clearly met the original system requirements, now does not? It's no longer a forced software upgrade (via GWX), it's a forced hardware upgrade.
Such is the side effect of the current versioning & release methodology.