But it also doesn't matter. I still think of "nano" as "like pico", but I would bet at this point fewer than 10% of the people using nano today ever used pico or maybe ever heard of it. They just know the editor is named "nano" for whatever reason.

"elm" (ELectronic Mail) begat "pine" begat "pico" (PIne COmposer) begat "nano".