Ram does not offer the Megacab in the chassis cab models. This would have given you that tight turning long bed Megacab without having to go the conversion route or choosing one over the other. With passengers rarely in my back seat, I was happy with my previous Supercab Ford and only bought a Crewcab because Ram does not offer one on the chassis I wanted.
The F450 pickup is the answer to someone that needs more than a Class 3 but does not want a chassis cab (Ford limited the GVWR to make licensing and insurance easier). I think there is a demand for the model but little room for competition in this niche. I needed payload for my next RV choice and jumped right up the Class 5 trucks instead of bumping the limits of Class 4...