Footed mainsail w/ flattening reef
I have always used a shelf-footed mainsail with a flattening reef, and attached to the boom with a bolt rope, for racing and cruising. Recently I was told that is old technology, and that the current state-of-the-art is the loose-footed mainsail. I now see that the America''s Cup yachts appear to be using mainsails that are attached to the boom, and not loose-footed mainsails. If the loose-footed mainsail is state-of-the-art, then why are the AC boats using "old technology.?" Can anyone explain, or have I been misinformed?