Re: Supersonic flight
"Concorde did make money, but simply didn't have enough routes."
After all the development costs had been written off...
The big problem seems to be that it could never have freached the safety levels of modern passenger aircraft. If more had been flying, there would have been more disasters. The situation was more or less that of the Space Shuttle.
What's more, one of the things that did for Concord was the reduction in cost of international phone calls and the arrival of the Internet. Now we have VR coming; by the time a new generation of SSTs is around, they could well be a curiosity.