My personal hypothesis is that Asian and cross-Pacific traffic has grown considerably in the decades since Concorde was flying and I look forward to wealthy eastern markets keeping the supersonic market viable. If American and United don't figure it out I could see a gulf country carrier or Singapore Airlines making it work.
Agree that this would be important except that there's basically ~no work being done on supersonic trans-Pacific flight. Boom's design doesn't have the range to operate trans-Pacific, and AFAIK there has never been any supersonic passenger aircraft (built or designed) that has had the range to pull it off.
I do agree though, LHR-JFK holds very little fascination for me. It's a relatively short flight with a lot of ground-side overhead time, so the benefits of Going Very Fast seem pretty minimal. The prospect of SFO-HND or LAX-ICN very fast though seems a lot more appealing.
Yeah. You can/could get JFK (or EWR) to LHR (or LCY) without a red eye. Not sure what routes exist these days though I've taken EWR to LHR in time for a late-ish dinner in the city quite a few times. It's a long day but even in Economy Plus seating, it's not much longer/less comfortable than flying coast to coast.
Boom would be lovely for LAX/SFO to Singapore if the range allowed it. That could take some of the higher end traffic away from middle eastern carriers to the region.
I haven't looked into profitability yet but a quick look at the list of busiest routes shows that Asia dominates the list. https://en.wikipedia.org/wiki/List_of_busiest_passenger_air_...