[zarzavat]

I assume you never lived under the Concorde flight path.

There will never be supersonic transport for normal people simply because the technology is unsuitable for use near people. Most people want to fly between cities and cities tend to be inhabited by people, hence the essential tension.

Supersonic flight only works for a few specific flight paths where you are flying entirely over the ocean between two coastal airports. The moment you have to fly over people those people are going to get very angry and ban you from their airspace.