The 738 isn’t a competitive aircraft though, when compared to the 737max and the 320NEO. The problem Boeing have is that the Max is the end of the 737 line, and it’s very difficult to multi type pilots on the Boeing fleets. Where Airbus have cornered the market in this respect. The 320 type rating takes you from a 318 to a 321, and with a short differences course you can fly the A330 and A350 all at the same time. Where you can’t fly a b737, b757 and a Dreamliner at the same time.