A few years back, during the height of the Aaron Rodgers/Mike McCarthy era, it was standard operating procedure for a search firm in the coaching world to almost impulsively recommend an assistant from the Green Bay staff.
Out came the likes of Joe Philbin and Ben McAdoo and for a while, we took a break from finding the next Patriots assistant coach to try to shove into a head coaching chair and became obsessed with another organizational philosophy.
After that it was the Sean McVay crew, the Kyle Shanahan crew. The Andy Reid crew (except for Eric Bieniemy) was also a trend for a time, and an easy area for an unsure owner to feel around in if they were uncertain about what they wanted in a new head coach.