Quite serious. LMAO. But
don't take my word for it.
LOL My perception happens to coincide with fact. Your ignorance on this topic doesn't make my statements incorrect.

Handheld GPS systems that are used off road i.e. on mountain trails are always displayed in Up = North mode. And all military GPS systems operate in Up = North mode. All Aviation GPS systems display in North = Up mode. All Nautical GPS systems display in North = Up mode. Just FYI.
In those kinds of more serious GPS applications, that you really need to know your track in relation to objects (like land, reefs, etc) that will ruin your day.. The last time I checked the earth doesn't rotate when you change direction.
With North up, you can take a quick glance and know if you are still heading in the overall right direction in relation to your destination. The map constantly rotating makes it more difficult.
I just love it when the guy I work with (who insists on direction up) makes a wrong turn, is driving in a circle on an exit loop and asks which way to go while the map is spinning in circles.. If it were locked in North up, would be no problem to quickly see which way to head.
The aviation industry, coast guard, army, etc. have all performed extensive usability tests and come to this same conclusion - hence the reason all of their systems operate this way. Those are the serious GPS users.