OK Boom.
I can't see there being much of a market.
I offer 3 points of rebuttal:
1. Transoceanic flights - the physical demand for that (at any speed) must be larger than in the Concorde days.
2. Tech - obviously has been and still is maturing at ever increasing rates, far beyond what Concorde designers could achieve.
3. Money. It is being hoarded by the "elite", and they have enough to literally use it as toilet paper or fireplace feed. They'll pay. They won't abandon their Gulfstreams and yachts for transportation, but they'll hit the supersonic market too, and in far larger numbers than the Concorde days. There's simply far more insanely, obscenely rich people walking around these days. And no, the money they spend on the tickets will NOT be a "Job Creator".