That’s more a function of crew cabs and using a pickup as a family vehicle. The bed has to shorten as the cab lengthens, else the truck gets unmanageablely long.
There are two models with full-size four-door crew cabs and 8' beds, and they can work in most US suburbs. I think it's less about whether it's manageable and more about the aesthetics. The front-rear proportions on 8' trucks just aren't great.