Soon after I started my first IT job, my boss had me fill out a spreadsheet with everybody’s local desktop password so we could do updates when they aren’t around. It was a very awkward week asking people for their passwords. That was almost 30 years ago, and I still remember a few people’s passwords.
Then we had fiber (FTTH) installed in my building, the installation company delivering the routers wrote everybody's router username, password and SSID with a whiteboard marker on the outside of the door, "to make the installation easier for the technicians".