Real Airplanes Made of Paper
Paper airplanes are great. They are inexpensive easy to manufacture and very economical to fly. Real airplanes on the other hand are very expensive, difficult to manufacture and are in general gas guzzlers.
Airplane manufactures need to take a step back and look at their paper airplane cousins for the next generation of airplane. They might have to work on the flying in the rain problem and a few others before the new paper airplanes are ready for the prime time.