This is my experience. We used bits and pieces of the metaplot here and there and ignored it for the rest. This differed from chronicle to chronicle, of course - my Mage 1e/2e chronicle was fairly close to canon in many respects, but my Revised chronicles less so (the current one doesn't even have any Traditions or Techies, for example.)
This is as it should be.
I'm of mixed opinion about the rules reflecting the metaplot changes. On the one hand I didn't much like having all the changes to Spirit and the Umbra shoved down my throat with Revised. On the other hand, those changes are absurdly easy to ignore, alter or revert to the rules of 1e or 2e.
The Avatar Storm is really the only thing that was there because of the storyline. There was some flavourtext about Paradox changing, but 2e Paradox was far more severe -- it forced you to wing it, because if you used the rules as written Paradox either did nothing or killed you bad.
There was an (apocryphal, I guess) story back in the day that, for a period, the Mage 2e corebook was outselling any other WoD book, even Vampire. (Which led to my favourite WW loony conspiracy theory ever, namely that Mage 2e was replaced with Revised because the top dogs at WW preferred Vampire and were insanely jealous of the success of Mage. Priceless.)
2e probably did outsell Vampire 2e for a short period after release, because this is how RPG sales work. The idea is extraordinarily looney, though. In my entire time writing, I've had maybe one note about another line, and that's when I was told I shouldn't have a backstory where a Mage NPC kills a bunch of werewolves because it's a tired cliche when it comes to proving how badass an NPC is. This was for an portion of Akashic Brotherhood that was eventually cut anyways.