It does make sense. I mean, why would you offer something for sale if you were only going to make one or two of them? Not worth the production costs.
Now I don't travel the highways much, but when I do I try to take notice of the trucks. I think I've maybe seen three Argosys, and when I do it's like "Oh, my God! A cabover!" I actually stopped next to one at one of the NYS Throughway Plazas last year.