Ah yes, an inefficient generator to recharge your 70k truck just to do what a 25-30k truck could do.... that definitely sounds like the truck of the future to me!
Dollar to dollar, the cyber truck is a horrible proposition, terrible functionality with the bed design, bland interior and exterior styling, and to top it off, a large price premium.
It's a fringe option, for a fringe use case.
Most people would never really be outside the radius of somewhere to charge in all their normal activities.