> No, that would almost certainly defeat the point of selling the models.

If the best models are so anticipated that people do anything to get them, seems like remote attestation fits perfectly here. There is no need to use it for lower quality models which are used by masses. Instead, it even works for marketing narrative where they do everything they can that their great models are used only those devices they allow, and no <name your country> can't easily use them. Maybe even helps setting higher price.

If they're not useful they can't sell them. If Mythos only runs on iPhone, what good is it for cyber security research?