Earlier quoted context omitted.
I'm skeptical. Trans-Pacific would be interesting for some because that's a long time in a plane even with lie-flat seating. But then you need a lot of range because once you have to refuel you've cut into your time advantage. NYC to London or Paris? Sure. But now you still need to find people willing and able to spend $5K+ each way. I'd like to do it but realistically I'm not going to.
I'd expect for trans-oceanic, you'd have people scheduling their travel around limited flights, given the unique offering. I.e. you aren't trying to figure out "How do I 100% capacity a 8:17am daily flight?" (traditional subsonic carriers) but rather "How much demand is there per week/month?" (Boom) If the flight is Wednesdays-only, then folks line their travel up on Wednesday. Because the alternative is a much longe…
BA and Air France understood that people paid extra to be able to quickly travel transatlantic[0]. That premium value proposition depends heavily on passengers' expectation that the flight WILL go at the scheduled time. The airlines had to invest significant extra resources in spare parts, additional staffing, and standby airframes to ensure on-time performance.
If the Concorde were to ever develop a reputation for six-hour departure delays or days of cancellations in a row, no one among their premium customer base would bother paying extra for it.
British Airways and Air France did profit from them prior to the 9/11 hijackings and the flight 4590 crash, so it's not an impossible hurdle to clear for Boom. But the value proposition for a new SST is going to be vulnerable to operational concerns that don't affect the rest of an airline's fleet.
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[0] https://omegataupodcast.net/166-flying-the-concorde/ - "Every now and then they'd have a survey amongst the regular passengers [...] 'What do you think you paid for your Concorde flight today?' These people haven't got a clue what they paid for their Concorde flight today. They just tell their secretary, 'book me on tomorrow's Concorde, I need to get to New York in a hurry!'"