Boeing develops only twin engined aircarfts except for B747. It even developed B777-200LR of twin-engined design and 16000km range. This makes many ailrines especially those of Southern Hemisphere, refused to buy B777 and switch to A340 instead because of ETOPS-free design of A340. In fact Varig of Brazil is the only airline in Southern Hemisphere to order B777.

Boeing is going to launch a new ultra-efficient mid-sized widebody twin, which is to replace B767, and has range of at least 16000km. Its twin-engined design is also ETOPS-restricted, so like B777, it would not be popular among Southern Hemisphere airlines.

Airbus, on the other hand, has much better aircraft development policy. Airbus knows only ETOPS-free quad-engined design can ensure most direct routing and best safety for passengers flying over extreme areas, so it develops smaller quad widebody like A340-200/-300 early in 1990's. This makes Airubs A340 very popular among Southern Hemisphere airlines, including South African Airways, which is going to change its B747 fleet to A340.