> It's also good for knowing how much daylight you get somewhere or whether someone there is likely to be awake right now.

The former is correlated with distance from the Equator (and knowledge of the seasons) but surely other than Dymaxion all the maps we care about do have an Equator and North->South ?

The latter is correlated with Longitude, and again other than Dymaxion surely all these maps will be the same in that respect ?

Particularly in practice with Artificial Light humans tend to live by the clock, which is thus dependent on local "time zones" and not strictly East-West position.