Normally I value your posts quite highly, but... come on, really? "If you want to get rid of the weight belt," how is that a generalization? I don't know how many times I've posted that now. If you don't like WI and/or prefer a belt, then please use it. If you're OK with diving only with non-ditchable weight, please go for it. But many of us need or want ditchable weight, hate the belt and want WI. Jacket BCDs have that problem solved. Obviously you'd get one with WI if you're part of that group, derp. BP/W doesn't have that problem solved, only other stuff you add on to it solves it.
... it's a generalization because it's not always a valid argument!
FACT: Many people who wear BCDs wear a weight belt ... either because their BCD is not weight-integrated, or because the weight pockets don't hold all of the weight they need.
FACT: Many people who wear BP/W do not wear a weight belt ... the person I dive with most often wears a BP/W with weight-integrated pockets.
FACT: Many people who wear BP/W also wear some form of ditchable weight, whether it's in pockets, weight belt, or harness.
I get the impression that your experience is rather limited to warm-water diving, and that's the perspective you're coming from. So while your statements generally hold true (though not always, and not necessarily) for the warm-water diver, they are not generally applicable to scuba diving in places where people require more thermal protection, and therefore more weight.
My own tropical rig includes a backplate that weighs just two lbs. I use with it 10 lbs of ditchable weight ... in weight pockets attached to the waist harness.
Your arguments are not always valid ... they only apply to your particular diving choices and preferences and for those who share them.
... Bob (Grateful Diver)
---------- Post added August 26th, 2014 at 05:24 AM ----------
Me, for one . . . I currently dive with two tanks and two regs.
Why would I want two tanks, two regs and a heavy steel plate? The plate doesn't bring anything to the party except another 6 pounds and less back flexibility.
... that's why God created aluminum ... I know some divers locally who dive an AL plate because a steel one makes them too heavy.
Once again ... as usual ... it boils down to choices. Some of you guys seem to think that backplates only come in one "flavor". Such is not the case.
... Bob (Grateful Diver)