Nemrod:Nitrox aside, the superior, modular, flexible and multi purpose wing/BP/weight belt will rise up to slay the puffy, cumberbund integrated weight BC units. They simply are unsuited for anything beyond limited recreational, tropical diving.
85%+ of UK divers go on at least one diving holiday a year. The figure is similar for US divers. From a totally unscientific survey of divers I have met in this area, most divers ONLY dive recreational and tropical once or twice a year.
The limited nature of their diving is more related to the days of holiday granted by their employer than the kit they wear or depth they go.