I will bet this keel was designed shortly after Australia II won the America’s Cup.
It’s a dead ringer for Ben Lexcen’s revolutionary keel.
But here’s the thing, while end plates are good and bulbs can make shallower keels more efficient than they would be otherwise, Australia II‘s keel was designed to get around or fool the 12-meter rule, not because there is anything intrinsically good about this design.
And yet a bunch of cruising boats at the time ended up with keels like this that will catch any piece of floating debris and have large vulnerable wings, just because it was fashionable.
Watch out for the results of trends like this when buying a boat.