Matt,
good point. I guess it comes down to the way windsurfers do it (I believe, never been windsurfing). They have sails that match the condition. Of course their sails (on average) probably don't cost 1500 each though. Also, for those of us who don't live in sailing paradise year round, we have to make our short trips worthwhile! Problem is that we are out of shape for dealing with significant wind.
This is intriguing really. these boats are light enough to get to the back of the boat, lift up the bows and go downwind.... who is to say you could do that upwind
Either way, full rig or not I am fairly certain I would manage to capsize when gybing anyway.