Because the high bypass engines sometimes have to be flat at the bottom to avoid hitting the ground I have long thought a high wing passenger airplane would allow the plane to be closer to the ground for small airfields and now they are thinking of building one. https://www.youtube.com/watch?v=Xm5LYkGHkTc&t=10s
Hope they do.
High wing passenger plane
Moderator: Mr OC Benz
High wing passenger plane
Parrahub, an extra option in the public transport menu http://www.parrahub.org.au/