100+ comments and nobody missed what's really going on: The old units don't have the resources for the new maps. I've got a Garmin and can see where they are

100+ comments and nobody missed what's really going on: The old units don't have the resources for the new maps. I've got a Garmin and can see where they are coming from: A few updates ago my unit demanded that a SD card be installed before it would load an update because the internal memory wasn't enough.