> I guess some kind of industry standard for criteria that a pass key manager must meet, and platforms accepting pass keys would promise to support any system m

> I guess some kind of industry standard for criteria that a pass key manager must meet, and platforms accepting pass keys would promise to support any system meeting those criteria? Basically what I would want. Or (better) for attestation to just not be a part of the spec in the first place. I don't think services should have the choice of cutting off authenticators. See sibling comments though, if Apple refuses to support attestation for platform keys, then requiring attestation effectively means cutting off the iPhone market, which is the next best thing to getting rid of attestation entirely.