Tampa, Boston, Toronto, Nashville, Winnipeg, Vegas, SJS
I disagree with all these except Tampa, SJS, and probably Nashville just because Nashville is just so balanced. If Boston loses one of their best players (Rask, Bergeron, or Marchand) I think they struggle to make the playoffs. If the Peg loses Laine, Sheiffle, Big Buff, or Wheeler, I think they struggle to make the playoffs. Vegas I think in general is going to take a step back and struggle to miss the playoffs largely because of the losses of James Neal and the fact that William Karlsson is likely to revert back to a more sustainable shooting percentage. If VGK loses a piece they're in real trouble just like the Flyers. But even if I agree that all of these teams can withstand serious losses to a star player...that's still 9/31 teams. In other words...what you said about the Flyers can be said about most of the teams in the NHL.
If that's the point I still disagree. If we are talking strictly about bubble teams my point rings even more true. The loss of a second liner for 40+ games won't hurt the Pens, but the loss of a second liner for 40+ games will hurt a bubble team.But you are kind of missing the point. Among the bubble teams who are in a somewhat similar situation to the Flyers, those teams might have 1-2 players that if injured would be a death sentence. The Flyers have 4.