everything is a compromise.
There is no such thing as no compromise.
The formula board has huge compromises.
To list a few-
large fin for going upwind means reaching in strong winds compromised. so upwind downwind courses needed. compromise also fixed 70cm fin makes it difficult to launch and sail in many locations. compromise. also means wide boards needed to hold down fin which leads to-
wide board hideously affected by chop which means cant foot off for speed and have to point high and use a correspondingly large fin instead(narrower board smaller fin would be quicker in more wind). compromise
planing performance optimised at expense of non planing perfomance. compromise.
big fat wide board needs large sail to work hence creating barrier to entry of less skilled sailors and hence minimal participation. Compromise
plenty more to.................
All classes have compromises, the most succesful ones in windsurfing have chosen to make the compromises in the interests of mass participation.
another point is the relative performance of old and new designs.
Back in the day there used to be intensive mass participation in longboard windsurf racing. In this environment the designs got very good. Nowadays there is only one manufacturer of raceboards, and they have none of the expertise of the old raceboard crew. Simply with the current absence of rules in the class there is no excuse for the phantom not completely destroying the old raceboards, the fact that they dont tells you a lot about the skills of the phantom design team or maybe they deliberately made it slow so as not to make the old boards obsolete- yea right! :-)