Also don't confuse revoking your right to use the software with actually stopping you using the software. That's an entirely different matter. Sure, Microsoft can't come into your house and seize computers with an infringing OS, or force you to wipe them, but that doesn't automatically grant you a right to use the software. What it does mean, is if you continue using the software you do so without permission, and if MS did sue you (after notifying you that they were revoking your license) your continued use after the revocation of the license would probably count against you. But that's hypothetical, because (as you pointed out) MS haven't sued any individual for breach of EULA (yet, and
AFAIK).