US olympic effort a bit different. That sail was designed to go upwind and down due to the "expected" light conditions but ended up with one of the windiest Olympics in recent times. A proper hooter is for reaching and downwind. Different sail shapes and cut.

VX40s use furlers as they sail in very tight conditions and courses, but mainly the boats are very powerful. Hoisting and retrieving from a bag would be a nightmare and would require extra crew.