> Supersonic falling out of fashion is just economics, it's not a forgone conclusion that better technology and higher performance will always be more popular.
The regulatory environment is the economics. A majority of airline customers won't pay extra for supersonic flight, so whether it's worth having a separate model of supersonic plane that might represent 10-20% of plane sales for planes of that passenger capacity is down to how much it costs to certify a new model of plane.
The regulatory environment is the economics. A majority of airline customers won't pay extra for supersonic flight, so whether it's worth having a separate model of supersonic plane that might represent 10-20% of plane sales for planes of that passenger capacity is down to how much it costs to certify a new model of plane.