Most posters, in their attack on Airbus, seem to be missing the obvious point that is wrong in Airbus's approach.
Surely it is not Airbus's place to say that it would be uneconomical to continue operating Concorde? What Airbus should do is provide BA with a cost of mainting the type certificate (no doubt they would make it enormous). Then it is up to BA, who pick up the tab, to decide whether they can afford it or not. The supplier gives a price, the customer decides whether they can afford it or not.
Or is this not the French way of doing business?