Cars used to have bench seats too.

There's three basic layouts for the cab of a pickup. "Regular" has two doors and one row of seats, maybe a tiny bit of storage room behind the seats. "Double" has small rear doors and a second row of seats with no legroom, this is where you cram your children or least favorite coworker. "Crew" has two full-size sets of doors and seats and they're about five hundred feet long because people only ever get them with long beds so they can pretend to be a contractor when they buy plywood sheets twice a year. They don't fit in parking spaces, their turn signals don't work, and they probably also have the extended wing mirrors to see around the trailer they never haul because it would scratch up their perfect chrome ball mount they never take off.