The National Hockey League's salary cap hasn't seen a significant increase in quite a while, partly do to the pandemic. The cap remaining flat has put a lot of teams up against a wall. Making it very hard for teams to keep their players, particularly their stars without handcuffing the rest of their team, but the cap could see a significant rise sooner than we think.
If the cap does indeed rise that much, it will give almost every NHL team the room they need to be able to build a more competitive roster, it aslo makes deals like Auston Matthews and the aforementioned Hagel a little bit easier to stomach.