The reasons behind Concordes (apparent) lack of commercial impact on the aviation market have been discussed at length. However, I don't see how you can say the aircraft was a failure. It operated commercially for 27 years and I believe BA did actually manage to turn some profit from it. It also only ever existed in one version, no need for -100, -200, -300 series. The original was good enough! No other airliner ever had so much public appeal as Concorde, a guarenteed head turner wherever it went. I wonder if we will see such a send off when the B747 is eventually retired fom service.
As for the A380, I have heard that the wing production team at Broughton has been told to slow down as the rest of the manufacturing sites can't keep up with them!