If there are sailors out there that want to sail boats with curved foils, go by an A-cat, F-17, or Nacra F20.
Leave the F-18's out of that game.
Would this then doom the F-18 design to obsolescence?
Sort of like when the N20 rule kept an outdated sailplan?
But I guess there are still many huge fleets of outdated designs (laser, Opti, Star, 420, etc)