Passkeys are great and all but most accounts still require a password to be set (that you won't then need to use) or need an authenticator (like Microsoft) but still offer a 'I've forgotten my password / lost my passkey' option - which is the default option hackers will concentrate on. Some accounts still use email as the last mile (send a password reset code to this), so no matter how strong passkeys are, your account may still be vulnerable to hacking via other means; for now, passkeys are just a convenience.