It’s honestly a shame that we didn’t keep pursuing sail technology. It’s great that we’re finally getting somewhere environmentally-friendly with ship tech nowadays as in the OP, but if we’d put the same amount of effort to innovate and advance sails like we did steam, I imagine we’d have pretty amazing (and completely green) methods of transport for all but the heaviest cargo loads (and even then, just split the load across multiple ships?).<p>Of course, nowadays the tech is probably so far behind that the cost of the necessary innovations to “catch up” sails to modern powering methods is completely prohibitive; I guess the environment will continue to take one for the team...