I lived in (and now commute through) a neighborhood of older houses, and higher incomes, so I see a lot of contractor vehicles. It seems like it breaks down as landscapers and lawn services use the pickup trucks; trades companies (plumbers, electricians, HVAC, carpenters, painters, etc.) use vans or box trucks; and the independent guys tend to use Dodge Caravans. Nearby, the university uses fleets of kei trucks (the low-speed versions because “freedom”), Ford Model E vans, and Caravans. I think the landscaping crew has pickups.
There are an increasing number of company pickup trucks, but most of them appear to be pavement princesses, used only for their usual function: transporting egos, not equipment.