Why all the concern about righting an overturned inflatable? I can't recall
ever hearing about an inflatable dinghy
with occupants being flipped. Trailed behind a yacht in strong winds... sure, it happens. But under way? Not a common problem!
I can't remember how much floatation is provided in POBs, or where it is located. I wonder if a swamped POB with an outboard
would still float, and in what orientation it would lie? My uninformed guess is stern down some ways if it floated at all (guess it depends on the size and weight of the o/b!), and that might interfere with attempts to right it.
And FWIW, we've known a few long termers who started with POBs and later changed to inflatables of one sort or another, and can't recall
any who went the other way. I don't claim that this proves anything at all... just an observation!
IMO the perfect dinghy has yet to be developed!