The author should have asked "Can we just implement it then?" because in some cases you literally can't implement the proposed API. That's the core issue with it. Unlike other contentious browser features, even if you wanted to implement attestation, it may be impossible to do so. More precisely, attestation may be impossible to implement on some platforms to the de facto standard that would develop over time. The de facto standard I refer to is the list of attestors web servers will accept. If your platform can't be attested by an approved attestor, you're screwed. That's why it's not that simple this time. The proposed attestation API is literally unimplementable in general. You can't implement it and you can't not implement it.
