I swear anytime someone asks a question about BCD's the BP/W group come out. For some of us new divers we still like the jacket style. I am 6'4" and weigh 280. I tried a SeaSoft Sea Lion size large and it was very very adjustable. I was actually on the small size for this model. I have switched to a Seaquest Pro QD size XXL and I absolutely love it. It fits like a glove and I wouldn't trade it for the world. Before all the BP/W guys attack me, I'm sure I will eventually go to that setup due to my plan to go tech and will need doubles. I just think for a lot of new divers BP/W is fairly intimidating. Customizing when you know what you need/want is awesome. Customizing when you have no clue what you need is much harder.
But customize you can.
Think of the savings if one base piece of gear could be adapted to many differing dives and skill levels, with little added expense.
Almost every one of us went through several BCD's trying to get just the right one, and then as our tastes and skills grew we "bought up".

That is a lot of $ over the years, speaking not only as one who has been there, but as a Dad who has two following their dad, with me footing the bill!
As I said in the post above, to me a wing is really just a new, and improved variation of the whole idea of a BCD. When what is now considered the "traditional" BCD first came along in the early 80's they were very intimidating too, and my first exposure to one nearly killed me, the whole concept was so new and foreign to me after years of diving without any such thing as an adjustable buoyancy system. :shocked2:
I have now seen new students started right out in the wing/plate system, and they have no more difficulty than any other OW students adjusting to their new buoyancy systems.
I truly believe the wing system is no more intimidating than any other system, if you are new to either. If is just different from what most of us first trained on. THAT, I think is its biggest stumbling block to a great many trained on older style gear.