"Cub Driver" wrote in message
...

And if the A380 is profitably successful, I'm sure Boeing could
rush-produce
a stretched 747 (main body and/or upper deck) in a fraction of the time
it
took AI to develop the A380 from scratch.

Not really. The stretch 747 was to have cost billions. But the real
issue is that there is no market for two super-sized aircraft.

There is no way to just stretch the 747, as the wing is at about the max
size for cable driven controls.