People probably used a lot of slate+chalk or wax tablets for regular note-taking.
Similarly, archival grade paper and printing is STILL really expensive and folks STILL aren’t doing that for their grocery lists and honey-dos. Not to mention that nearly all of our digital writings are extremely ephemeral. Wont somebody think about the future historians!!!
Last one I remember was related to the keychain update, you had to re-acknowledge all of the maintainers in the arch-keyring.
It was a lot of work to visit them all and get them to recite their key signatures while I held their hand to make sure they were really there. The blood tests took a while to come back and affirm their identities, but it was worth it for the piece of mind.