> Look at trucks in the 1990s and compare the size.

If you actually compare similiar configurations, you'll find basically no difference in size.

Compared to a 90's F-150, a modern f-150 is

* 1" wider

* Either 0' longer or 1' longer depending on the exact configuration

* 1" taller

* Nearly 1k lbs less heavy (lots of weight optimization in the past ~35 years)