He probably had a DIESEL engine truck and does not care for the v10 gas'r is one guess. 2 he probably likes the cab better in a truck vs a motorhome a or c. I know I think the cab area in all the ones we looked at (c's) really sucked as they had little for the driver and most attention in coach area. turn around seats were the BIG thing, but again they are mainly worthless IMO.
Its really scary for folks to be driving something they have no clue about. Watched a guy try to maneuver in a rv park with brand new A and he almost hit a couple of trees as he did not know how to really drive it, turned to short for the size.
But if he can afford the loss on trade ins its his $$ so I guess he can do whatever he wants.