This is spot on imho. Although I would extend it to include the entire A340 family which only sold 377 copies while the 777 has sold 1593 to date. Total domination.
As for Boeing they ceded the middle of the market to Airbus and sat at least two decades too long on a 737 technology that was begun in the mid 1960's.
Hence why Airbus dominates the middle the market and Boeing the upper end.
The A340 should be lumped in with the A330 (I believe the MSN's are intermingled between the 2 models): a lot of the systems/components are the same between the 2, the 2 aircraft were developed simultaneously as well.
It was 1 family with different models (shorter range to ULH).
I was doing a countdown in my head until someone made that argument.
As you might recall, both planes were marketed initially to completely different market segments and are clearly not the same aircraft although they share some of the same technology.
Boeing fans could make the same argument regarding the 757 and 767 as they also were developed at the same time and share many of the same components. But that would be ridiculous wouldn't it? (everyone nodding yes....).
The A330 grew into a fine aircraft that served as a nice upgrade replacement for the 767 and filled a void between the 767 and the big boys.such as the 777, A340, and 747. But it is not an A340. Not even close.
757 and 767 are aircraft of different sizes; most of the frame itself is different. Irrelevant reference.
A330 (-200 & -300) and A340 (-200 & -300) share the same fuselage, same wing, and most same systems; that's what, maybe 90% commonality. And you think they are that vastly different aircraft?
They were marketed to different missions; which actually make it even more remarkable that such a common airframe can have so vastly different missions.
Following your train of thought, the 777-200 and the 777-200LR are 2 different aircraft? They have different engines, different wingtip treatment and one was aimed at US domestic market while the other is an ULH variant.