Go to any sailboat Marina and you'll find huge numbers of owners are pulling out their diesels and installing electric motors and or many are buying torquedo electric outboards to use when navigating into and out of marina.

The big catamaran makers are switching to solar covering their roof area with panels which gives them enough to navigate purely by solar without draining the batteries and still even charge the battery so they can continue to operate overnight. I actually expect catamarans to get rid of sails pretty much completely and go pure solar as for most latitudes the solar is a guarantee much more than the wind.