The problem with this infographic is that they aren't depicting the size of the trucks in proportion. That 37%er is probably 3x as large as the 64%er (the whole truck itself)
Bed size is measured in feet. There's never been a light-duty truck with more than an 8' box, which is probably what the first one depicts. The last one might be a 5' box but way more 6' boxes get sold. So yah, they're smaller, but they sure as hell aren't half the size. Putting it terms of overall length is disengenuous at best.
I have an 8' box because I want a toolbox and still be able to get a lot of undesirable stuff in the box besides. I wouldn't have a shortbox.
No, it's an extended cab model, which have tiny beds. Like, you can't even fit standard construction material (8ft) in it with the tailgate down without it sticking out well past the tailgate.
Yes, trucks are longer than they used to be, but extended cabs are far more common than they were. Living in a city, the vast majority of trucks are extended cabs with tiny beds.
They're basically SUVs with an open trunk. Enough room for a tool chest and a cooler, and you'll need to hitch a trailer if you actually want to haul anything.