Speeding through puffs into lulls is a problem in keeping foilers moving well. The engineers who say it will never work note that the dynamic of fast moving air and a fast moving foiler is always changing: I have to sheet in and out some on my A-class soft sail to keep the twist working and the rig flying. I should think a solid wing mast would be a nuisance under puffy conditions. Real life ain't no wind tunnel with linear air flow!