[patd]

With your system, if I live somewhere flat and I go to the mountains, I will be out of juice during the climb. Tesla has a battery indicator in percentage and the navigation which is pretty accurate. Your ICE car has a gauge for the tank and an estimation of range.

Tesla should probably not allow you to show the battery as range as it will always be inaccurate and people will complain. But if they only show percentages, people complain as well.