The above poster is correct - supersonics are suboptimal for eastbound, especially when you consider they can only be used at speed over the ocean.
A super sonic flight that leaves JFK at 6PM arrives at 2AM in LHR after 3 hours of flying plus a 5 hour time zone change.
It's much more optimal to take a lie flat seat on a traditional aircraft, get a decent nights sleep on the flight, land at 7AM, shower at the lounge, and charge forth with the day.
My view is that the lie flat bed is really what made supersonic obsolete, and I see Boom as largely a folly.
