Had a friend who owned an older yawl rigged boat (custom wood boat). It was 36 feet long, and I think he just loved the look more than anything else. Though one advantage, I don't know if it has been discussed here, is another element he loved. While at
anchor, the mizzen sail acted as a "riding" sail, and would keep his boat pointed with far less movement than sloops. Another friend who has a CT 41 ketch, likes the same thing about his mizzen sail while at
anchor.