Weather and wind direction variance prevents traditional sails from being practical. They barely even need a crew on these ships, and can pretty much ignore th

Weather and wind direction variance prevents traditional sails from being practical. They barely even need a crew on these ships, and can pretty much ignore the prevailing wind direction. There's insufficient economic incentive to incur the significant costs of operating with sails. There's a reason the age of sail is in the past, it couldn't even compete with steam.