> The tricky aspect of Passkeys is that there doesn't seem to be an easy way to use them on non-Apple devices (IMHO not a deliberate lock-in, but a hard problem in general).
I think you're right that password managers will probably evolve to handle syncing across devices. I was thinking about how iCloud Keychain doesn't work with non-Apple devices (solvable with third party password managers, I assume).
Not sure if this is what you mean, but Google has pledged rich passkeys support: https://blog.google/technology/safety-security/one-step-clos...
Also, I'm under the impression that password managers will evolve to also become passkey managers. Am I missing some reason that can't happen?