And it's also a lot less important. If you are using a boat for pleasure, part of the fun is in driving it. Meanwhile, for commercial vessels, the ROI is not going to be very meaningful. A ship with capacity to carry 20,000 20-ft containers only needs a handful of people operating, only a few of whom are actually piloting it. A cruise ship might have tons of crew, but again, only a few people doing piloting and navigation. There's probably a small market for small commercial vessels and maybe some recreational boats, but overall, there just isn't the demand for this in the way that there is for cars or trucks.
