For every reason/theory/explanation we can muster, there will be the anti examples that disprove them. The right book/composer/thee/cast at the right time with a whole lot of luck is what does it.
I LIKED SR. My kids, however, loved It- and I KNOW they didn't get all the show or Shakespearean references. My son listens to the recording everyday. (Granted, it's only been a week) For me, I just got a little tired with the whole predictableness of the premise. In fact, I remember thinking near the end of Act I thinking, "Wait, is this without an intermission, because I am so 'done" with this."
Interestingly enough, we saw Hamilton the very same day -- and THAT is the only show my son has ever asked to see again. (and on the way out) My dd was adamant that SR was her favorite of the day. A day or two later she had changed her mind. She admits, for her, it had to sink in a bit more.
If we're not having fun, then why are we doing it?
These are DISCUSSION boards, not mutual admiration boards. Discussion only occurs when we are willing to hear what others are thinking, regardless of whether it is alignment to our own thoughts.