The ATR's are retired now. They were old and tired but they were moved to the mainland after SJU was closed. There will always be a market for smaller aircraft. Delta plans on keeping 125 of the 50 seat CRJ's in their fleet long term. The new generation Turboprops are fantastic aircraft. They fly almost as fast as the jets and can often be turned quicker since they don't need to be fueled. The Bombardiar Q400 can carry up to 86 people, cruise at 400 MPH and operate out of Beef island today with no runway changes. There are bigger and faster turboprops coming!