Sorry, but one has to ask: Are you nuts?? Why would I, or anyone, want to drive a car for 21 straight hours at slightly more than jogging speed? And do it with no heating or cooling? Do we forget the sound system as well?
Perhaps you meant a cumulative 21 hours in scores of neighborhood trips but that can't be done. One can't start and stop at a constant 20 mph. I rather imagine starting/stopping in an EV wrecks your mileage just as in a petro powered car.
20 mph!?!?! lol, that is just too funny. I don't doubt the statistic but sorry, that car is not for me. I like to gas up and go. Fast and hard if I need/want to.
So....do you drive a Tesla as your only car? Just wondering.
I am making the point by giving a range.
Like 200 miles of range if driven like a bat out of hell with AC on.