Trucks are very much a product that identifies you as "one of us" vs "one of them". The Cybertruck will fail that test utterly. Owning one screams "I'm one of THEM". Not what you want if you want to make inroads in the mainstream pickup market. (Not to mention that recharging a truck with a 220V line in rural America, where folks often park nowhere near their house, will be a major problem.)
Yes, this truck will be popular initially among well-heeled yuppies who want to stand out -- probably taken entirely from the existing Tesla S market (or S wannabes). But unless you leave SF/NYC/Boston every once in a while, you don't realize how small that world really is. No more than 5% of this country can afford an S. And while this truck is more affordable than an S, its appeal is much narrower. It will attract only the vanishingly small Venn intersection space that's Tesla S + pickup-drivers-who-don't-actually-haul-anything.
This thing will flash on the radar for a year or two, in small sales numbers, then die utterly, with poor sales used thereafter, once the fashionista bloom fades.