If this is about "[hardware devices] for generating and authenticating accounts"...

here4funzies on June 6, 2022 | parent | context | favorite | on: Apple Passkey

If this is about "[hardware devices] for generating and authenticating accounts" like WebAuthn FIDO et al what happens when I upgrade my Macbook. Do I revert back to password in order to associate the new private key (or hardware generate password) with my existing account?

stetrain on June 6, 2022 [–]

The keys are synced through iCloud Keychain, presumably also to your new Mac.