I am in the 'you can't convert energy without loss' camp, however, perhaps more importantly, who will troubleshoot, diagnose and repair such a complex system, especially at sea? I pose this question to builders who use similarly complex and rare propulsion systems and frequently get the laughable, "we'll use a modem or satellite link to remotely evaluate and diagnose the system" response. In this industry we have a hard time getting conventional propulsion systems diagnosed and repaired, and those are, well, extremely common. Manufacturers who buy into these complex systems almost never invest enough money in support, dealers or training. From my perspective, if it is even slightly less reliable than a conventional diesel (and it's def more expensive), why would I go that route?