There’s simply no precedent- certainly not with the Penguins- for the insertion of qualified young players into the roster leading to team success.
That's actually true and not sarcastic at all, if you are referring to the *voluntary* insertion of young players into the lineup. The myth that Mike Sullivan was once-upon-a-time flexible and open-minded in his approach to young players is just that -- a myth. Unless they are from Bahston (John Marino).
Not a single blessed one of the Wilkes-Barre 5 or 7 or whatever it was got into Sully's lineup because Sully wanted them there in 2016. They got there because injuries left no other choice.
Fortunately for guys like Rust, Sheary, Wilson, Murray, Kuhnhackl and whoever, the 2015-16 WBS Penguins were pretty much comprised of nothing BUT young players and were not overloaded with elderly players (Tommy Kostopoulos aside) or middle-aged mediocrities. Because if that team had a bunch of available rejects like Jansen Harkins, Kevin Porter, Greg McKegg, Louis Domingue, Chad Ruhwedel and Colin White, the talented young guys would never have gotten a whiff of the NHL over those scrubs.