The Flyers’ long and thus-far-futile chase after Sidney Crosby and the Pittsburgh Penguins dates to a stunning and sobering afternoon nine years ago, to the sight of a team president bitter over the past and a general manager pondering the future. The Penguins had just embarrassed the Flyers, 6-0, in Game 5 of the 2008 Eastern Conference Finals, finishing them off to advance to the Stanley Cup Finals, and in the bowels of the building then called Mellon Arena, then-Flyers president Peter Luukko and then-general manager Paul Holmgren were coming to terms with what the Flyers had to do to catch up to Crosby & Co.