I see a lot of claims regarding controle of data. But only 1 option (Fauna.com) as to actually store the passwords. (Or am I missing something).

This would mean I do not only need to trust your code. I also need to trust this totally 3rd party with my passwords...

Further you list it works everywhere, but are missing a cli variant (so not everywhere).

As to the trust claim in the fake exchange between the 2 people. Nobody talks like that, if they do not want to use a password manager it is always another reason than trusting the code. (Or all you would need is some audits to create that trust) It just gives the feeling (to me) this is a piece of software looking for a problem to fix.