It is surprisingly very durable and maintenance-free even for a script kiddie like me to maintain. My advice is (at least when it comes to Vaultwarden) don't think too much about this, just selfhost it, at least for yourself. You'll probably be able to manage it when something happen.
and not using their official clients,
your database stays functional in perpetuity.
My host has prebuilds for Vaultwarden.
Reimplementing the server side is the easy part.
But a commercial offer will need rebranding the client, and maintaining forks is much more involved. As long as Bit warden publishes the sources ...
Theft is also usually obvious.
If self-hosting, keep at a separate location than your hard drives.
It was audited in 2024: https://www.heise.de/en/news/Password-manager-BSI-reports-cr...
I don't like being considered a resource to be stripmined by any company, but some are worse than others by the nature of our relationship. I do not need a company greedily looking at my bank password, my Google password, my brokerage account password, and even having them be tempted to look at my set of passwords with them and start valuating which password they can "intermediate" and charge me more for using. I don't even want them pondering the question of how they can break exports ("oops, sorry, passkeys can't be exported because $SECURITY_BLATHER, guess you won't be migrating" - to be fair, while I think Bitwarden had that for a bit I believe it's no longer true, but AFAIK it is true of other things that will hold passkeys for you) so that they can extract the value of my passwords to me.
I don't trust Private Equity or the Harvard MBA mindset to be allowed to hold on to my passwords. I don't trust any company holding passwords to not eventually be acquired by PE/HMBA types looking to stripmine my passwords. I don't trust any company that is, once you trace the entire value chain down, basically taking out real debt with my passwords as collateral. They get the money, I get the risk. Hard pass.
So I'm not happy about self-hosting my password vault in some sense... but who else can I trust?