It's not about satisfying the needs of one or two airlines though. BA reportedly made a profit operating Concorde in the latter years: it was a very nice niche product for them. The British and French governments lost a fortune on a programme that only saw 14 aircraft ever delivered to end customers.
Compare that with the hundreds of new commercial aircraft orders today (it's the first day of the Paris Air Show) from aircraft with a more widespread demand. The A380 is regarded as a niche aircraft with not-entirely-satisfactory sales figures, and it confirmed 20 orders today to add to an existing order book of over 260
Compare that with the hundreds of new commercial aircraft orders today (it's the first day of the Paris Air Show) from aircraft with a more widespread demand. The A380 is regarded as a niche aircraft with not-entirely-satisfactory sales figures, and it confirmed 20 orders today to add to an existing order book of over 260