This is such a restrictive security model though. Sure, devices are already identifiable. That is a security issue in my opinion. Yes, authentication is one use case where it is actually beneficial. But the security threats from this are far greater in my opinion even if you include phishing. Privacy is a concern for users even if it is conveniently ignored here.

> Your privacy is important to us.

Privacy statement of the group and I think it is a straight lie. This is a major if not the major security concern. TPM didn't address the problem and therefore isn't a too popular guest.