@almostconverge@stavvers I also dislike most breathless tech hype. In this case, I think the kite advantage over mast+sails+keel is that you can add the kite to existing ships with minimal intervention.
However, the better way to curb emissions is still to reduce total trips globally, particularly when the purpose of the trip is to transport fossil fuels themselves.
If the kites are cheap enough, maybe they can be a stopgap on the way to achieving that.