There is a point in getting faster. The Concorde run profitably for the later 20 years of it's lifetime. At its best it did the New York to London route in unde

There is a point in getting faster. The Concorde run profitably for the later 20 years of it's lifetime. At its best it did the New York to London route in under 3 hours. At more than double the speed of a subsonic flight. I have taken multiple 7 hour and 3 and a half hour flights and I would pay a significant premium to cut the 7 hours in half. It's not that I would have more of the day available. It's that I would spend less time in the plane. Being in a plane for a long haul is miserable. In the nineties if flew profitably for a 10% markup over regular business class. I would wager a supersonic jet liner could make a lot of money crossing the Atlantic or the Pacific even today. Sure for short hauls it makes no sense. Btw, Boom is working on supersonic private jets,they recently flew a scaled down experimental jet at supersonic speeds.