When you say "construction", are you referring to something like drywall/framing/roofing or electrical/trim work? I ask because fitting a stack of OSB sheets in a van can be anywhere from challenging to impossible (depending on the type of van of course). Certain trim levels of the F150 for example, are designed with the specific requirement of being able to accommodate standard sizes of construction materials, like a 4x8 sheet of OSB.

Transits and sprinters are designed to be able to lay 4x8 sheets flat on the floor.

Disagree. I can fit lots of oddly shaped things in the bed of a truck. Vans have walls and doors that create hard limits.

> A van is better in almost every dimension for construction.

Vans are nice and in the used market often cheaper. I used to rent/borrow a friends full size van before having a truck. Still, the roof creates limitations. Can't transport a fridge or water heater upright, for example.

And for towing as mentioned, a van is limited to a bumper pull trailer whereas a pickup can pull a fifth wheel or gooseneck.