They don’t even resemble boats any more!
No more nor less than an F-22 resembles a Boeing 707.
The multi-hull "catamaran" design has been around for so long we don't even know when it began; possibly prehistory. A written description of one goes back to 1697. Modern catamarans have certainly been around for our entire lifetime.
The faster the boat travels the faster a crew must act and react in a race situation. So long as the rules are adhered to, technology should be allowed to provide as fast a sailing vessel as possible. These are exciting competitions IMO, and even more so with the upgrade to this design.