I actually memorized one of the codes for a specific account in case I ever lost all my devices for some reason.
From that account I can rebuild/gain access to everything else. It’s kind of a fail safe.
That may sound weird to many people but for work I travel, including internationally, quite often. The danger that my devices while away from home could be destroyed/lost somehow is pretty real. Thus the idea that I could basically walk into a store, buy a new device, and then be up and running again at 100% helps me sleep at night.