I think this is right. Celtics 80’s was very high. Bruins 70’s was very high for a lot of people I know. For me the Patriots peak was 2014 because of how desperately I wanted Brady and Belichick to get #4 and how much I hated all of America for dismissing Brady’s skill along with Deflategate/Spygate. But Red Sox -Yankees in that era tops it all and 2004 was the apex.I would argue that it was more than just the peak of the rivalry. It was the peak of our entire fandom of any team in any sport, ever. Nothing will ever matter as much again.
Edit: whatever game 5 changed and whatever relative ease game 7 granted by being a blowout was all overwhelmed by the monsoon-level stress that was game 6. Any other year the Sox lose that game...Clark hits a walk-off pop fly or there’s an error or the umpires refuse to overturn their blown calls.