Off the cuff, I would guess it's a power-to-weight issue. People with yachts want to fill them up with granite countertops and pools and grand pianos and who kn

Off the cuff, I would guess it's a power-to-weight issue. People with yachts want to fill them up with granite countertops and pools and grand pianos and who knows what else. Whereas a hydrofoil boat needs to be built with more like airplane sensibilities.