There is an old football proverb that goes, "Even Saban stayed true to Hurts until he pulled him for Tua in the second half of the championship game." Seriously though, my opinions are often based on how coaches and/or front offices address positional importance, with the latter included in the decision making at the professional level. They generally stick with their quarterback until either: a) his performance dips below their expectations; b) his performance tanks to the point they, fans and media all agree he should be replaced; or c) another quarterback already on the roster exploits a rare opportunity to wow their socks off. I know Prescott critics' opinion of his established performance to-date is poor. In my opinion he has performed well-enough that only Option C might potentially unseat him within the next five years. Lastly, I believe the continued evaluational impression Jerry Jones and Jason Garrett (and especially Jones) have in Prescott is much higher than my own own. I think they (especially Jones), just like Saban, will stick with Prescott no matter what UNLESS a 'Tua' falls in their laps. I say that in deference to OP and Broaddus' original question. There is outsider opinion and insider opinion. And insider opinion does not foresee Prescott as The Weakest Link.