At the time we booked, there were two nonstops from Miami. One on the Max, which we did NOT book, and another on a 738, which left Miami later. AA cancelled OUR flight and left the Max in place. Now, our outbound flight has been changed back to what we originally booked. So far the return flight has not officially changed, but according to the latest update, the Max is off the schedule into August, so our return flight will be changed eventually. Presumably back to what we originally booked.