“Sorry, my old phone broke, I had to do a clean install. Don’t mind the warning.”
Loss and replacement of cryptographic tokens is an everyday occurence, and it is PITA to resolve.
Imagine trying to ascertain in 2100 if a particular will signed by a 20-y.o. using a 2022 digital signature is valid or forged.
We don't even know what is going to happen to the reliability of the algorithms themselves, much less cert issuers, revocation lists etc. Companies come and go. Certain files from the 1990s are already unreadable.