The SI prefix thing stems from a joke anyway. Allow me to trot out the etymology again:
Once upon a time in the 1980s, there was created a program for reading ELectronic Mail called Elm.
Someone created a rival mail reader called Pine, which followed both the tree pun as well as the fact it was a recursive acronym: “Pine is not Elm”.
Pine had an editor called the Pine Composer or Pico for short. Pico is both a typographical term as well as an SI unit. They may have been going for both. Too perfect a pun to pass up, perhaps.
Due to licensing uncertainty, someone else created a from-scratch clone of Pico called Nano, cementing the continuation of puns, but in the SI direction.
And then apparently someone else has decided to get on the bandwagon with Micro.


I seem to remember having little to no trouble with the 5 to 6 transition on my old system, so I’m inclined to believe that.
I just need to get my head - and backups - in order for the day I decide go ahead with 6 to 7, just in case it doesn’t go smoothly.