> the better part of a week. People do that because it takes 15 hours to travel. 100 years before people will go visit say family for few weeks or even months

> the better part of a week. People do that because it takes 15 hours to travel. 100 years before people will go visit say family for few weeks or even months because travel was slow, now we fly for thanksgiving and back at work the following week. Travel behavior changes depending on the mode of transport and cost of it. > incrementally faster trip it is not incremental, we are not shaving couple of hours, it is radically faster trip, 15hr -> 1 hr is a huge difference. > prefer routinely flying first class in a 747 vs. taking the Concorde Concorde was quite popular for that one route though, that was not enough to save it. The challenge then was not there were not other economically viable routes - there were, it was just that nobody was allowing supersonic flight over land, for example San Fransisco -> New York route would have been very successful. With 2.5 hour on a Concorde a flight you can work (i.e. do meetings) in both cities (esp NY->SF) on the same day. It is a 5 hour flight now you can really work in one city the day you are traveling.