(not OP but…)

The Doctor's advice I don't get the reference¹, but for deprecating a device this could be a concern if your phone or similar device suddenly stops working² and that is required to prove who you are.

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[1] perhaps searching for some officially, erm, unsupported medication resulting in getting blocked by a service that list closely enough linked to an identity provider that the ID account is locked also? — seems a stretch

[2] or is lost/stolen – a potential problem with any physical security token or virtual token if you only have it associated with a single device