@bender Well honestly, this is just it. My strong position on this is quite simple:

Do the simplest thing that could work.

It's one of the age old UNIX philosphies.

Therefore, the simplest thing™ to do here is to just increase the hash length, mark a magic™ date/time as @lyse has indicated and call it a day. We'll then be fine for a few hundred years, at which point there'll be no-one left alive to give a shit™ anyway 🤣