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Tech has been in aggressive growth mode since 2008 because the Fed was handing out free money (interest rate lower than inflation). That allowed investors to dump money into tech businesses in hope of rapid business expansion, which in turn makes the business more valuable.
The free money dried up. Now these tech businesses are going to find out if they’re sustainable.
There are sailed powered logistics ships! Here’s a grain ship that just launched. There are also companies that produce inflatable or deployable sails to reduce fuel consumption in favorable winds.
Ultimately there will be a need for chemical energy or similarly dense energy to move a ship. The wind doesn’t always blow, and when it does it won’t always be in the direction you want. Nuclear is certainly an interesting option.