Imo the nhl is almost on par with the Nfl in terms of parity and making the postseason. With the wonky point system and injuries and the sheer randomness of the game, it’s pretty easy to go from bad to good in a year or two, or vice versa.
Vegas is an obvious example, but if you look at Ottawa, who was one goal away from a finals appearance in 2017, now they’re a tire fire. The Devils got in after being irrelevant for the past few years, etc etc. Baseball and basketball are pretty top-heavy, but hockey and football are pretty unexpected, which is great news for all the teams and fans.