It wasn't due to the cost. It is the whole business of avoid pilot retraining - which is apparently "must-have" for airlines. At some point, Boeing prioritised

It wasn't due to the cost. It is the whole business of avoid pilot retraining - which is apparently "must-have" for airlines. At some point, Boeing prioritised papering over the fundamental difference in the flight characteristics of MAX _above_ the pilots' needs to be informed of what is actually happening with the plane.