Because companies aren't buying trucks anymore, they're buying vans instead. Manufacturers have realized that people are buying trucks for their daily driver, s

Because companies aren't buying trucks anymore, they're buying vans instead. Manufacturers have realized that people are buying trucks for their daily driver, so they've optimized the product around that. They've moved to a more car-like comfortable interior and they've stopped selling the regular cab (2 door) models because they don't sell. They pretty much make mostly double cabs because you need a backseat to drive around kids (again, car like). The 5 foot bed is fine because you're not hauling a 4x8 sheet of plywood anymore and a 8 ft 2x4 fits diagonally fairly comfortably.