That's exactly what I said. They have only changed in terms of boat weight and materials and rigging used and hull design. You can polish up an old A-Cat and put new rigging and sails on it, and you will not be able to tell the difference unless you try to pick it up. That's why at A-Class regattas, if there are enough older, heavier boats, they have a separate division for the heavier boats.

And, who knows, if a Unicorn design were built at today's minimum weight, maybe it would be as fast or faster than the existing designs. Has anybody ever tried that?

It is nice to have a class where it is at least possible to think such a thing is possible. If the class allows hydrofoils, it starts becoming a whole new animal.