I'm sure that there will still be plenty of multi-passenger cars.
But to your point, most people who drive trucks actually use the bed maybe a dozen times a year, and many people who have high occupancy vehicles take far more trips with only themselves or 1 additional passenger than they do fully loaded.
Single occupancy vehicles aren't practical for most people because they need a larger car some of the time, but if you don't own it you're free to request whatever vehicle you need right then.
Going to work by yourself--lightweight single occupancy. Picking up the kids--minivan.
But to your point, most people who drive trucks actually use the bed maybe a dozen times a year, and many people who have high occupancy vehicles take far more trips with only themselves or 1 additional passenger than they do fully loaded.
Single occupancy vehicles aren't practical for most people because they need a larger car some of the time, but if you don't own it you're free to request whatever vehicle you need right then.
Going to work by yourself--lightweight single occupancy. Picking up the kids--minivan.