Tesla should go ask Toyota and Nissan about the difficulties in building a pickup. Both have failed to dent the truck market even though their cars are very desired. Mainly because their vehicles do not stack up to American made trucks.
Personally I do not perceive any Tesla truck making a dent in the truck market except for special circumstances like local delivery. Tesla has never made money and does not project to do so in the near future. The have huge quality issues and even the experts are laughing at his quick charging claims.