Fundamentally the decision to flog the 737 further rather than look to commence a modern design to compete in the market place for the next 30-40 years is the death knell.
No amount of changes at board level can change the impact of this decision.
You could realistically see Airbus introduce the next generation to their fly by wire family, competitors from the Far East start up and bring ultra modern jets to the market and Boeing will still go on stretching the 737 and fitting even bigger more forward engines. At what point do Boeing see sense with this? It’s all a bit bizarre.
The Max issue seemed sciences way of saying “enough already”. So it does raise the question of how long are Boeing going to continue with what was a pretty good project upto the 1980s maybe even the 90s.