By the way if you want to know what it was like at (almost) the very last moments of sail freight I very highly recommend "The Last Great Grain Race" in which Eric Newby writes of his experience working aboard a wind powered grain freighter from Europe to Australia in 1939. Sail shipping was suspended during the war and finally ended for good in 1949.

(In typical Newby style he had zero sailing experience when he signed on, though he was an excellent writer).