You really have to wonder where Boeing go with this. Over a year lost 737 cashflow, massive penalties to customers, and the pain and cost of fixing it. But what option do they have? A clean sheet now wouldn't see light until 2025...what to do in the meantime? I can't see any option other than persevere...MAXs will be going very cheap by the time this is all over. Surely the clean sheet has to be on the way though...