Lots of excellent answers as expected.
Would you say more the music or more the scene?
Thanks to everyone for giving examples of why you love it.
And everyone thinks the more the merrier? You couldn't be happy with two or three a year.
Back in the GD days I wanted to make as many as I could. Each show was unpredictable and had a place in history. Potentially even great. The scene was unlike anything I've ever experienced before or since. Making it into a show was a bit of a personal victory.
Much the same with Furthur, though not as big in scope, and not quite the event it used to be. But still plenty fun. They are on a limited time frame unfortunately, and that has some bearing on the number to make also.
It is my chosen place to go party, have fun, be part of something bigger than myself that's positive and it fulfills something in me I don't find elsewhere.
I guess I happen to see it like this though. If I had season tickets to baseball, by the end of the season I would resent having to go to all the games. The work, parking, weather, good days, bad ones etc. I am happy going to see them infrequently and catching up on home media. Not knocking those who go all the time here ok. I just find my fun going on occasion and not to every one. Try not to be to mad at me for it.

Different opinions can make for good conversation.
Ok back to the question, why so many. Lol. Is there something more that happens at 30 shows a year than 5?