== MD-80's closest competitor == 

 Why is the really stub information about Boeing 737-400 being the "closest competitor" of the MD-80 being moved around as if it would be important. Unless sourced, that's really a piece of information out of the blue. The plane has been offered to customers and buyers for 30+ years, and it has been competing with a lot of aircraft types during those decades. 

 Appreciate the other edits you've made in the MD-80 article; sets the style, adds quality.