The hard wings don't allow for reduction of sail, at the end of the day you don't drop the sail, throw out the anchor and head home.
The hard sail reduces the need for sail area reduction. The wing can more efficiently cover a wider set of conditions. When shortening sail is needed, opening the leech is a much more efficient (read as less drag) setup than on a typical mono or cat. They just put them on a mooring, let if feather and have someone there the keep an eye on it. I read something like it's actually very stable when centered and allowed to spin on a mooring.
It would be interesting to see the economics of design and construction. Where one wing could take the place of SEVERAL suits of sails from platform development through the event itself, it might be cheeper in the end.
