True. But the competition is still moving in the direction of one design. Like it or not. The AC75 is still a good bit OD supplied parts is it not? Just as the AC50, with the hope of reducing costs and getting more teams involved. I know people like to see visual differences in the boats but the faster these things go and the more computers and algorithms get involved the design competition will be in non visually noticeable elements.
The typical F1 race-day fan can't tell you the differences between the Ferrari and Mercedes cars besides the engines are different manufacturers. And F1 has not been great to watch the past 5 years since Lewis Hamilton and Merc are a cut above everyone else in the field. I am just now getting into Formula E, which uses a supplied chassis and battery (formerly supplied McLaren electrical power unit). Now they are using the a new supplied chassis and battery and engine manufacturers are now permitted to develop and use their own electrical motor.
The sport needs to be a competition of who the best sailors are. Whether the F50 is the best platform to find out remains to be seen.