people will pick the corporate options that are shoved on their faces, not the sensible open source user-respecting ones.
vendor lockin will happen if we adopt passkeys as they are right now.
Bitwarden just announced a consortium with Apple, Google, 1Password, etc to create a secure import/export format for credentials; spurred by the need for passkeys to be portable between password managers (but also works for passwords/other credential types)
The interoperability already exists in the protocol webauthn, part of FIDO2 which has been around for almost a decade. Interoperability is not remotely an issue with passkeys. Imported/export is/was and also already has a solution in the works.