They can be less practical but they can also be more practical. The only autonomous sailboats in the world use solid wingsails, but with a different control sch

They can be less practical but they can also be more practical. The only autonomous sailboats in the world use solid wingsails, but with a different control scheme than traditional sailors are accustomed to. This allows them to be operated without any of the complexity or danger that you'll see in an AC50.