P28: Mono?Foiler

Photo Alain Grosclaude
Interesting project with lots of research and development. But just one question: Why put so much effort on a mono type foiler to achieve max speed??  Less weight? Better rightning moment?!
The Hydroptere should have gone this path then?
Great respect for them and their project, but hey I would have gone other way with so much technology and money invested. Will try to get some feedback regarding their choice.
More info at  https://www.p28foiler.com/