Are they going to stop dead and torch the existing airframes? No.
Will they get anywhere near 4000, or even 3200 (target for the US + original partners)? Good question.
Will the UK get its 138 aircraft? Another good question.
Would the program have been cancelled if the truth about cost and schedule had been known when this thread started, three years ago? Good question, but wades into the swamp of alt.history.