On: Put your usernames and passwords in your will, adv...

[Terr_]

There's an additional threat to consider: What happens when it burns up in a fire, soaks to illegibility in a flood, etc?

More than half the reason I implore my parents to digitize their ink-scrawled Sheet Of Login Stuff involves having an off-site backup. Leveraging it to help with end-of-life planning is just a bonus.