Your answers are as good as saying "...until Garrett dies". First, how many "better" coaches, per your definition, exist? Then, any of these Schmitty-defined "better" coaches won't come to Dallas with Jerruh, anyway.
Well, I doubt that is the case, like I said, I would have been very happy with hiring Reid, just last year.
My answer is not the same as saying "until Garrett dies," but it simply doesn't have a predetermined number. I don't know if it's 2 more seasons, 3 more seasons, 1 more season, whatever. At some point, it would become obvious there is a better opportunity, and I would suspect that opportunity will occur sooner as opposed to like a decade from now.
I don't have an exact number though, and it's not reasonable to think there should be an exact number. If Rex Ryan was to get chopped in New York I'd want him right away.
The sad reality is something you touched on, though. As long as Jerry is here, we're not gonna have success. Whether its because the elite coaches don't want his meddling, they'll only take his money when they are on the down side of their careers, whether he poisons even a good coach's efforts, or whatever (probably all the above), he's a ruiner. It's amazing we haven't become completely numbed to it already.