With all due respect it is not a unibody. Definitive differences between the two including that the body panel areas on a unibody are lightly or non stressed. With an exoskeleton or more specifically monocoque chassis the traditional body panel areas are structural.
Tailgates are 2ft wide. Pallets are 4ft wide. The bed immediately supports weight. You're wrong twice because tailgates arent rated at all for liability reasons.
Not even close. 3500lbs is about the weight of a mid size car. Park a Monte Carlo on your tailgate and see what happens. Pickup tailgates regularly break when loading large atv's. Roughly 700lbs is a general recommendation. 1000lbs and up is a gamble depending on the model. Cybertruck is a...