You obviously still don't understand. In how many ways can a jacket BCD be adjusted? It has what, 3 straps that you can pull on? 4 if you count the cummerbund. You pull them tight and that's it. Other than that, either it fits or it doesn't. In how many ways can a BP/W be adjusted and customized? Hundreds? Several thousand? Millions? And don't even try to downplay this, because this is one of the strengths, if not the main strength, of the BP/W system that people continuously propagate. It's customizable, adjustable and replaceable to no end. And that's what makes it more complicated.