Its coming from American teams too.
I think people aren't highlighting the fact that we had a flat cap from about 2020 to this offseason. With less growth in the cap, being able to maximize cap space became more important.
So much complaining about "advantages" recently, but really, what is the advantage exactly? The advantage always seems to be having the ability to sign large free agency contracts, when historically we've seen these large contracts go sour fairly quickly for teams. There is a common "the players take home more!" comment but even then, you're on the road for 41 games just like everyone else and taxes are split accordingly, though I will say I do imagine that players out west pay more compared to east coast teams, whether that be due to cost of living in some places (looking at you Cali, Vancouver, Seattle).
Its not as if lower taxes allowed huge FA signings which lead to a cup for teams lately, Tampa sold a good majority of its futures to get some cost controlled guys over the years to stay competitive. Florida drafted well for years and made a couple of extremely shrewd trades to solidify that roster. Colorado also with drafting well, and having the ability to sign some mid tier/depth guys. Vegas... you know the story, besides that, to round out the last 10 years of Stanley Cup Champs, you have Washington, Pittsburgh, St. Louis. Again, not teams that really went out and broke the bank in free agency, they built strong teams over a few seasons and added a piece or two.
The real kicker in all of this is, again, talking about these tax advantages most people point the finger at the southern states and teams, TPA/FLA/NSH/DAL and all, and all of these teams seem to barely be in the black financially (funny accounting or not).