On the Tesla Transport truck issue...
I think this application really lends itself to battery swapping, specifically automated battery swapping.
It seems that semis are five to six times everything automobiles are. The horsepower, range, cost, etc.
I envision something like a Cabover custom sleeper arrangement similar to the photo's below. the part behind the seam could house six to eight 100kwh Powerpack units. The whole assembly on rails that slide on to the chassis from either side. When it's time for a swap just drive into the Tesla Transportation changing station where the depleted energy unit slides off one side on rail extensions while a fresh one slides on from the other.
If the energy units were leased units capital requirements would be lower for the vehicle operator while efficiencies of scale maximized and costs minimized.
Of course one could still charge old school but six - eight pack super charger stations would have to be built, which will likely happen in some form or another.
This allows the trailer infrastructure currently in place to be maintained, with some eventual upgrades like underrun protection on the sides and rear and aerodynamic improvements.
Some research material. for your perusal. http://www.thetruckersreport.com/facts-about-trucks/https://www.tesla.com/en_CA/powerpack
And this concept that relies on a gas turbine to recharge thereby maintaining reliance and the downsides of fossil fuel use.https://nikolamotor.com/one