Hi Sfprop,
Though you've given up windsurfing, it seems to me you still are quite active and have many worthwhile interests. I faced the same body fatigue questions with regard to skiing and concluded that after living in Hawaii for 10 years my body just isn't built for cold weather sports any longer ;)
You pose and interesting question about fewer boarders on the bay . . . expense of the hobby perhaps? My buddy that has been on the bay told me not to even think about going there till I can waterstart like a pro. He said it's very busy with big ships that cannot slow or turn quickly. Ships, sharks, cold water, high wind . . .Yikes! Sounds a bit scary to me!
Jeremy