If it’s your job to turn something around in three years with measurable progress each season, you don’t have the luxury of a long leash for your coach. Or even a medium leash.
Similarly, nobody wants to talk about the long string of failures you often get flipping HCs every three years and how that compares, on average, to the stability and production Dallas has gotten out of Garrett.
I’m not sure why that is.
Perhaps because the data doesn't support the long list of failures flipping coaches, at least not on the Super Bowl level. The data shows that success happens quickly for Super Bowl-winning coaches or not at all.
That doesn't mean there aren't plenty of failed experiments at coach for every team, just that you have to keep trying until you find the right fit for this current age of NFL football.
Now, the argument can be made that a lot of coaches simply don't make it as long with one team as Garrett has, but still there's no evidence to support that that method works, other than the lone exception during the salary cap era, Bill Cowher.
Right now, the NFC coaches vying to go to the Super Bowl are one who took his team to an NFC Championship Game his first year and won a Super Bowl in his fifth and one who is in his second season as a head coach. They fit the pattern.
In the AFC, you've got a coach who won his first title in his second year with his team and one who took his team to the NFC Championship Game in his second year and the Super Bowl in his sixth. (If Andy Reid wins a Super Bowl, he will join Cowher as anomalies.)
What some are hoping Garrett can do doesn't fit the pattern. Let another coach see if he can be the next one to be the right fit at the right time. And if not, move to the next one after a few years.