Because noone wants to pay. We are still flying the same speed as we did fifty years ago. Imagine for a second that you could fly from London to Sydney in ten h

Because noone wants to pay. We are still flying the same speed as we did fifty years ago. Imagine for a second that you could fly from London to Sydney in ten hours (that's the Concorde speed on a route over Panama City so that almost all of the flight is over a sea to avoid any problems with sonic booms) but a ticket would be 15 000 dollars. Noone developed that plane.