The 340-500 and the 340-600 didn't meet there promises and have not sold. They are pretty much doa. The airplane didn't do its job ECONOMICALLY. A lot like concorde...
The 777 200 LR is selling well now (delta among other now putting them online)
American used to operate MANY 747s. They did away with them well before 9/11, and the last 747s they operated were the 747SP. (yes the smallest ones ever made with the long range, though 400s were later stretched to that range) They were replaced by the MD-11, which also didn't make its promises, so the SPs were brought back for a while till the 777's arrived.
I didn't say there was NO market for the A380. Just a TINY one.
And boeing has NOT raised there forecast for large aircraft. You moved the goal posts by 100 seats. they are still forecasting 500 or so aircraft with a capaity of over 500 seats. You included 400 or more seats... Different animal.
And 757 production ended with the 737-900 as the replacement, but that hasn't sold well even though it has the capacity and better fuel burn.
Cheers
Wino