I'm sure that Carbon mast, foils and 150 kg boats are better, faster, more fun indeed, that is true progress.
But that is no more F18.

Since the start, F18 are low tech boat: no foil, no carbon mast, 180 kg -heavy-, no wing, that explain the success of the class.

F18 is closer to SMOD than A Class and C Class, the concept is to have very similar boat. Today most of the boat use 3 mil. thickness sails.