I don't follow the current schools of thought, other than on CCR's, but I recall the days when I was 13 years old and I was the only one with a power inflator on my horse collar BC, every else had oral inflators so I was the cock of the walk.

So back in the thrilling days of yesteryear, the prevailing concept was the ability to ditch weights FAST. I just got rid of my 8lb SS backplate and am going back to adding 8lbs split between my existing 8 lbs of ditchable weights when diving dry.

The back mounted Inspiration rebreather's BC does not hold one's head very high out of the water.