That may all be true, but there are other benefits that could make it worth it. For example it could be, in theory, self-sufficient forever if something else br

That may all be true, but there are other benefits that could make it worth it. For example it could be, in theory, self-sufficient forever if something else breaks down making it unable to maneuver. Then you can at least sit in the middle of the sea and have your heating and cooking and desalination working until you repair the propulsion.