We are discussing very often about EK or QR as the most important customers for Airbus or Boeing.
But the reality looks a bit different, as we can read in the link above in the case of LH.
The Lufthansa Group is today´s biggest Airbus operator worldwide and that is not going to change soon.
We are talking about the following fleet:
Plus orders for 9 A388s, 9 A330s and 85 A32x.
AF/KLM is another good example of a very important customer.
The future may be a bit different, but today we shouldn´t over-estimate QR and EK influence as there are a lot of existing important operators, which are discussing with A and B behind the scenes...