As someone who has raced cats and now sail moths, foils aren't something to rush straight into. It took the moths 5 years of development and the worlds fleet dropped from 100+ to just 30 over that period, but is now re-surging very strong and will probably have its biggest worlds this year. But the development costs were high. Companies like bladerider tried to commercialise it, but the warranty claims and the development costs sent them bankrupt. Plus the main thing is that it nearly made the class extinct. Hindsight could say the move to foils was the best thing the class did. But not a risk for a relatively new class like the F16. And the development is still going on in the moths. We reckon we have added 2 knots of speed every year from the first foilers.