This narrative is a little silly. Would it not still be cheaper to retool than to go clean-sheet? Imagine a 757 that employs new materials, new electronics, and new engine technology.

Here's the problem - Boeing already has an aircraft in the 180 seat market. Boeing won't steal its own market share from these stupid MAX contraptions. No net gain for Boeing. Lack of jigs isn't the issue.

We are where we are because Boeing enslaved themselves to WN at a critical time. That's it.