For me it is not recording credentials with the assumption I would simply remember them later, while having every opportunity to archive them before eventually forgetting. Also, not keeping detailed enough notes & photos of exactly how my hardware is attached.
Me, finding out this exists after buying a used sff HP pc and wondering why it won’t display out to any new monitor unless I unplug and plug the power cord: 💀
Luckily (or not so luckily), I was able to turn off the HP “security feature” from the bios. The pc came from a former school fleet of sff pcs