They've a;ready taken about 500 reservations at $20K a pop, so it's pretty obvious several companies (UPS, WalMart, Budwieser etc) think it will work for them, even without a national recharging network
When most of us think about semi trucks, we automatically think cross country trucking, but that's not how the majority of them are used and that may never be what the Teslas are used for. Many companies use fleets of trucks to move goods from sea ports to warehouses and from warehouses to distribution points which are only 100 to 300 miles away and routes like that will work for BEV's without a recharging network. Plug them in overnight and they will do what you need the next day on a single charge
Another really practical application for battery powered big movers is city buses because they typically only rack up 150 to 200 miles per day. Many large cities are converting their fleets quickly to battery powered buses - They have been popular in Europe for some time now
The future of all electric transportation is looking brighter every day - One day it will be the norm and fuel burners will be the exception!
Don