[helen___keller]

Attestation is an issue in incentives, particularly on the part of website owners who lose incentive to offer a decent UX to non-attested users when most users are attested.

Apple PATs in isolation cannot achieve this, while google is making a new web standard that will almost certainly achieve this if it is successfully pushed.

That is, apple-only PATs are compatible with an open web. WEI as a standard is incompatible with an open web.

That said, PATs become dangerous in a world where WEI is being pushed - to that end I’ve recently disabled PATs on my iDevice.