What about "do not put all of your eggs in one basket"?
... I think it was covered with...
An order that big cannot be fulfilled by just one customer. Last time AAL made an order that big, it was mostly Boeing and back in the 90s - they are still receiving planes from that order.
I think this will speed things up for them, which they need if they want to remain relevant among the giants that Delta and United have become since acquiring Northwest and Continental.
The bigger question will be what are the regional airlines in the US gonna do when AAL steals all their pilots? What is gonna happen to American Eagle with such a large order for quasi-regional jets from "Big Brother"?
Other regional airlines have ordered big Embraers and CRJs, but the Neo is nudging right up against RJ territory with operating costs. Boeing's 737 successor is surely to be a new model so as to one-up Airbus' re-engined A320. This will lower the Boeing product's operating costs more - making it even more like a big RJ.
Very interesting news.