From the interesting linked document
Reasons for the project’s cancellation (or the „interruption of completion“ as our chiefs prefer to call it) are multiple and some of them will remain unclear even to us as long-term insiders, but we can assure that it was not a crew’s request for a glass cockpit that killed the Connie.
That glass cockpit was / is nothing short of incredible. To be honest it would seem that the project - however crazy - was well underway. What will they do with it ?