They key difference around the risk of security breaches between this proposed service and 1password is that user data in the 1password cloud is encrypted clien

They key difference around the risk of security breaches between this proposed service and 1password is that user data in the 1password cloud is encrypted client-side with a key derived from the user's master password, so there is no way for anyone who gains server access to see the passwords. In the proposed nopassword service, the server would have to maintain passwords in a less secure way, since it would need access to them in plain text to automate setting/resetting/filling them.