re: Reliabity and Worth (of the truck)
That's why it appears that Tesla is going to start using them to haul parts from the Giga Factory (in Sparks, near Reno Nevada) to their production lines in Freemont, California.
Do that for 6-12 months and there will be a wealth of data about the running costs and total life costs for the trucks.
Setting up Charging points around the USA will be problematic due to the power requirements especially in cities. The last thing Tesla needs is for a brown out to happen when a truck is plugged in to charge.
I'm more interested in the fantastic new battery tech that will be used in the Truck and the Roadster.
If (and it is a big one) they can pack 200KWh of battery into the new roadster then any concerns about range and 'range anxiety' should surely go out of the window.
Only time will tell though.