It works that way for electric cars. You won’t find many BYD electric cars in the US, yet they are the top-selling battery electric vehicle manufacturer worldwide. Only thing stopping them from doing the same with this, is that it’s a tensy bit tougher to gatekeep information than a car.

I’d guess it’s because of the shape of the car structure. In a pickup bed the blast goes up. But if it was in a car or suv all the energy would go horizontally out the windows since there’s a roof stopping it from going up.