I think the best place for most of that information is a keepass file stored in an E2E-encrypted cloud (the non-sensitive stuff should be known to more than one

I think the best place for most of that information is a keepass file stored in an E2E-encrypted cloud (the non-sensitive stuff should be known to more than one person in the household anyway - but if you're single it can be a good idea to leave a printed sheet with contacts for all the electricity,... suppliers somewhere in your flat). The main question is how do you keep the master password both safe and accessible in emergencies? I see some people here suggested Samir Secret sharing which sounds like a great idea. But how do you make that practical for non-technical relatives?