The doubt is more "how will tech companies use passkeys as an excuse to do something stupid" than "passkeys themselves must have inherent problems because tech companies are pushing them".

Passkeys could be the savior of all security problems worldwide from a capability point of view and tech companies would still ruin it by trying to force ways it pushes you into their ecosystem instead of just being whats both secure and convenient.

As an example, I have 3 different passkey _APPS_ on my phone and cannot go down to one because of various reasons with each (such as MS authenticator, forced for integrating to Microsoft at work).