I have two trip odometers. If I leave one never reset since the car was new, then it reads consumption since the car was new. I had the same on my Model S which was 306 watts/mile with 90,000 miles on the car. I actually drive quite briskly around town and love to show off the acceleration at green lights. But on the fwy I stay around speed limit of 65 to 70.
Excuse me, but a Tesla has an actual computer inside (more than one actually).
So I hope there are plans to let the owner see the consumption and other driving + charging characteristics in a more systematic manner.
This would be good for the resale value, since there would less uncertainty of how the car was driven and charged.