I'm still annoyed that the default in Google Maps isn't a spherical mapping. You can set it to use a sphere if you're logged in, but that's not the default.
In the past, the only reason for a flat map was paper, but since it's now easy to project a 3d image on a 2d screen, there's no reason that online maps should ever use anything other than a sphere. Yet, Mercator is the default for Google Maps, which just confuses another generation of kids.