To move the topic a bit off subject: Given the structural and maintenance advantages of wing pylon mounted engines and their one principle disadvantage (longer landing gear) why don't we see more large high wing passenger aircraft?
Think about the advantages of a lower fuselage when designing and marketing one airframe for passenger and freight applications. Or to offer a military cargo variant of a commercial model. Boeing tried and failed to sell its 747 for this app. in part because of the handling equipment that would be needed (and unavailable at some sites) to load and unload it.