What's the most important lesson Canadiens' Marc Bergevin has learned?

Marc Bergevin is heading into Year 7 as general manager of the Canadiens and the team has missed the playoffs in two of the last three years and finished 28th in the overall NHL standings last season.
Obviously, Bergevin has made quite a few mistakes along the way. But with four years remaining on the contract extension that team owner/president Geoff Molson gave him in November 2015, Bergevin’s job does not appear to be in jeopardy. The Canadiens made the playoffs in each of Bergevin&rsqu