This site is taylored mostly to the hobbyist, we do what is easier for us and on our bodies. Full deeps as everyone knows are heavy, too heavy for most to be throwing around.
Most of the big operations that I've read about use all deeps. We have a decent size outfit in Varnado, Louisiana, I've been to their place, they use all deeps.
Now a good friend of mine, a full time beekeeper, uses all deeps, and he does it all by his own labors, and he's a thin guy, no muscle bound guy like you would expect, he's quite the anomaly.
When its about making the most bang for your buck, deeps make you the most honey.