Im guessing most of the parts of the new Nacra F16 come from the Infusion (mast, beams, rudders, boards, etc) in order to keep the price down for both tooling and manufacturing.
Downside is probably a heavier boat and it might not be responsible to get every weight gain just from the hulls (instead of spreading it across every part).
If it sails as good as it looks they might have a real winner here.