The issue with lat/long isn't just that it's inconvenient, but it doesn't map to high density structures. A resident of 432 Park Avenue, the tallest residential building in the world with 96 stories, would share a lat/long with 95 other people.
LatxLng Apt 23C
Also, when sorting mail looking up lat-long for every item is tedious, so we could name the address by the town/city name that it is local too.
Now lat-long is getting to be redundant ...