yeah, IMHO the design was messed up by a few very influential companies "over fitting" it for their company specific needs
but I don't think attestation per-se is bad, if you are a employee from a company and they provide you the hardware and have special certification requirements for the hardware then attestation is totally fine
at the same time normal "private" users should never exposed to it, and for most situations where companies do expose users to it (directly or indirectly) it's often not much better then snake oil if you apply a proper thread analysis (like allowing banking apps to claim a single app can provide both the login and second factor required by law for financial transactions, except if you do a thread analysis you notice the main thread of the app is a malicious privilege escalation, which tend to bypass the integrity checks anyway)
But a lot of the design around attestation look to me like someone nudged it into a direction where "a nice enterprise features" turns into a "system to suppress and hinder new competition". It also IMHO should never have been in the category of "supported by passkey" but idk. "supported by enterprise passkey only" instead.
Through lets also be realistic the degree to which you can use IT standards to push consumer protection is limited, especially given that standard are made by companies which foremost act in their financial interest, hence why a working consumer protection legislation and enforcement is so important.
But anyway it's not just the specific way attestation is done, it's also that their general design have dynamics push to a consolidation on a view providers, and it's design also has elements which strongly push for "social login"/"SSO" instead of a login per service/app/etc. i.e. also pushes for consolidation on the side of login.
And if you look at some of the largest contributors you find
- those which benefit a ton from a consolidation of login into a few SSO providers
- those which benefit from a different from a login consolidation (consolidation of password managers) and have made questionably blog entries to e.g. push people to not just store password but also 2FA in the same password manager even through that does remove on of the major benefits of 2FA (making the password manager not a single point of failure)
- those which benefit a ton if it's harder for new hardware security key companies, especially such wich have an alternative approach to doing HSKs
and somehow we ended up with a standard which "happened" to provide exactly that
eh, now I sound like a conspiracy theorist, I probably should clarify that I don't think there had to be some nefarious influence, just this different companies having their own use case and over fitting the design on their use case would also happen to archive the same and is viable to have happened by accident