I get that..... But don't some divers choose to use a weighted backplate with a BP/W and have no option for ditching weight other than ditching their entire rig? Just curious.....
If I can't stay afloat in my shiny backplate and trim weights on cambands, it is likely becasue I had a heart attack or a stroke or some other event incompatible with life. Or at least: with staying afloat even if I had no gear dragging me down.
And conversely if I have not had a heart attack or a stroke, and for some reason my aircell absolutely cannot float my rig, and I am getting exhausted, I still can get out of the rig and ditch the whole thing.