What if you RAID01 it, so you have four safety deposit boxes, two with the first half of your password, two with the second half of your password? Then no snoop at a particular bank would be able to get your password, but also if one or two go missing, the password won't be lost. And you just check all four boxes once or twice a year to make sure everything is good.

Better do Shamir's Secret Sharing instead, set threshold to 2/4, and regenerate all parts if any part goes missing.

My (large) bank is yanking their safety deposit boxes out. They let subscribers know that they have, like, 1 or 2 years to go. They're doing it across the branches. They basically feel it's not worth the liability any more, and the way it was presented to me, it's not just them, but other banks are also doing (or at least considering) this.

Things we take for granted. When my father passed, I was digging stuff out of SDBs that he had for decades.

Maybe not safe for valuables. What about stuff that has no value to anyone else? I'm not a villain from Ocean's Eleven, no one is stealing my passwords to break into my elaborate safe.

What I found out when I was burgled, was that they don't care. I had nothing valuable in my firesafe but they still took it wholesale. I found some papers from it drifting around outside afterwards like they had dumped it out. But not my passport or SSN card. The lock was even broken so they could have just opened it to see that and saved themselves the lift. But again, they don't care.