The last paragraph does it for me in the credibility stakes don't remember hearing those statements in the 00's it was Lockheeds way or the highway
Outgoing F-35 programme boss shares hard won lessons
"Somewhere along the way, we made an error in our parametric weight models," Burbage says "Turned out we were predicting the things that we knew about pretty well, the structural parts were pretty close, the small detail parts were pretty close. What wasn't predicted well by the model was stealth and internal weapons bays because the airplane that had those capabilities weren't part of the database."