Overly rigid misconceptions and stat-watching aside, I am very curious about where specifically this scenario and past scenarios differ/match, and I think there can be a really interesting discussion about that.
Anyone actually watching the Canucks games can observe that they naturally play a style that would specifically result in a very high PDO. They play a highly skilled and structured puck possession game where they have the puck most of the time but they'll never waste a shot unless it's a high danger scoring chance. They'll always hold onto the puck and regroup while maintaining puck possession if they don't see the scoring chance.
You can also argue that their defensive approach affects save% in the same way, being highly successful at getting goals early and then doing a good job of turtling and preventing high danger scoring chances, but in a way that allows the opposition to take as many low% shots as they want.
My question is, did past high-PDO teams also have high PDOs for that same reason, but something about that style of play itself is truly unsustainable (and if so, what specifically ended up being the reason that made it unsustainable?), or did they play no differently from everyone else and just happened to have high shooting % as a random stroke of luck?
If it's the latter, why HAVEN'T there been more high-skill teams approaching their game this way?
Those are the real questions, not this overly reductive bottom line numbers thing.