It was interesting at the Auckland International Boat Show recently to see boatbuilders and marine engineers crowding around a rebuilt Gardner 8cyl (all tikety boo, polished brass etc.) and almost drooling. I swear they all stroked it like lovers. I think it was only the naive owners and would be's who otherwise drooled at the horsepower ratings and comparative minor dimensions of the Cats, MANs etc.
However the most relevant illustration as to why you should retain the engines is the fact that Marmot and Kiwi would offer their left testicle to take them off you.