I suppose that you are right if there is any such thing as a $4B opportunity
that depends on being somewhere at a specific time. I any event, a BBJ will
never be the cheapest way to get anywhere.

Will it ever be the most reliable? The airlines have more planes to
swap around if something breaks, for example. And the private jet is
subject to most of the same air-traffic delays, isn't it?

Let me preface this by saying that I am by no means an expert. I
think with some fractional ownership jets, you have a choice between
several. Therefore, I think reliability would be less of an issue. I
also think that air traffic control can subject private aircraft to
the same delays as commercail. However, our city has 2 airports. One
downtown with mostly private aircraft and one large interanational
airport. I have been 16th in line for takeoff from the international
airport, but it is rare that a lot of aircraft are moving or taking
off at the same time at the downtown airport.