My interpretation is that it is already self hosted, with cloud-type features, but without having to do something different, occasionally, to keep a safety net. People tend to forget to do the non-habitual, slightly painful steps. Setup your self hosted infrastructure with all the automated redundancy you want ahead of time and let it roll.

Because KeePassXC (or any other offline password manager) cannot lock you out as long as you remember your password, and you can completely avoid storing your passwords in plaintext.