I have been to about 10 other arenas. The atmosphere at MSG changed the day they littered the place with speakers and began blasting music to quiet the crowd.
It is RARE when I agree with you, but you are dead on here. MSG USED to be LOUD, obnoxious, and a GREAT place to attend a hockey game. Cheers, chants, screaming, atmosphere, everything you could want in a hockey game, without cute "amp-up videos", mascots, t-shirt tosses, music, and anything else you might find at a minor league baseball game.
The loudest I've ever heard MSG, and actually the loudest crowd I've ever been in was Game #6 of the 1986 Patrick Division Finals. It was all natural noise. No artificial crap pumped through speakers.
The NHL hated the politically incorrect, yet FUN, atmosphere inside most arenas through the 1980's and early 1990's, so they encouraged blasting music and "fan interaction".
If you yelled what used to be common at the Garden in the 1980's, you'd be arrested and probably sentenced to a short jail term.