a user will want to move their passkeys to the Credential Manager of a different vendor or platform. This is currently challenging to do, but FIDO and vendors are actively working to address this issue and we wait to see support for this take hold across the market.
Good list of issues in this article. This issue of Credential Exchange Protocol / Format is so key to me, and so timely for this article, since the initial 1.0 was done a year ago. AFAIK there aren't implementations yet, Passkeys are locked on a device.
