It wasn't the Paris crash. The jet never paid its development cost - if it hadn't been a sort of dual-country national champion it would have been cancelled ye

It wasn't the Paris crash. The jet never paid its development cost - if it hadn't been a sort of dual-country national champion it would have been cancelled years earlier. Ultimately the problem was the per-passenger costs were too high. It didn't carry many passengers compared to the subsonic commercial jets, and anything moving that fast is going to use a lot of fuel both because of air friction and also because you can't use high-bypass engines. There are only so many people who are willing to trade $5k to save a few hours on a trans-Atlantic flight. A separate but not insignificant problem was noise. It's quite noisy compared to modern airliners, and it was forced to ocean routes because nobody wants his windows rattled by sonic booms every day.