This is what I do too, but be warned about “fire proof” - a fire that results in the total loss of your house will create enough heat for enough time that fireproof gun safes and smaller fireproof lockboxes will be destroyed, or even if not, their contents will get hot enough to combust anyway.

A bank safe deposit box offers a different security profile that’s probably more robust against fire because banks burn less often than houses.

It’s probably not practical to really be robust against fire without being buried several feet deep.

This. A physical safe provides something that you can't do digitally: It's hard, but not impossible to get in without credentials.

On the internet, it's either: Public for anyone in the whole world, or impossible to recover if anything goes wrong.

Alternative - my partner and I (and also two other close contacts) have password managers that contain each of the other one's secret. This was less an effort to help with the memory loss scenario and more of an effort to deal with death and access to services (especially to cease subscriptions and the like).

In a lower trust scenario you could probably use a lawyer as a broker of the secret (potentially even as part of a will).

In general whatever kind of backup plan you have for when you die could also work in this scenario, you may just need to think harder about anything that you do not want have revealed when you die.

sometimes simpler is the best. I am always on the move so vaults don't jive well with me. my concern would be for something to still happen to it, too. I'm trying to go by the principle of not putting all my eggs on one basket.