I know this isn't likely. It's probably not even possible, or legal. But I wonder if the DVC "points value" concept of timeshare could be applied to a boat on the DVC Cruise line. I know that you can use your points for a cruise (though it's not a particularly good use of your points, value-wise). But what if a new boat were built and christened and interests in the boat were sold via DVC? They'd still collect maintenance fees (perhaps one problematic factor would be the cost of fuel?). And to tack on to
@andysol 's argument, nothing makes it easier to stay immersed in Disney than not being able to leave the "resort" without drowning.