Self-Hosted Main

I think the right name for this kind of thing would be dead man switch

Most drives nowadays are SED enabled, you could just set a random password and lock them

what to immediately nuke

This scenario is the one that you have to approach differently than the others. The only way to approach with this scenario and be reasonable sure it'll go the way you want, is to have the default state be inaccessible. i.e. everything that you want to be "nuked" has to be already in an encrypted state that only you are able to access. This way, the nuked state is the default state if you aren't around to grant access.

You might be interested in https://github.com/ItalyPaleAle/hereditas

It's a deadman switch that houses your docs/data, encrypted, on a self hosted static website.

I recently thought about as well and I will probably code something myself.

Current idea is to give 2 ubikeys to my wife and my mother. Together they have a pw which can be used to decrypt a gpg backup with all documents and the master pw to my vault warden instance.

Also, take a look at this: https://github.com/potatoqualitee/eol-dr

Vaultwarden can send a link to a person of your choosing with all your passwords if you do not login within a certain amount of time. This is key.... Mortgage, banks, wifi, email, utilities, credit cards..... This list goes on.

Had a friend pass and his wife could not cancel some things without a death certificate, even then she had a hard time.