A couple comments I added:

There's a sweet spot. Too few/low activity feels WAY worse than "omg where'd all these people come from?!1"

Having this many means that we have enough folks to help each other and we can take time for ourselves to do our own things. Sometimes. Sometimes it's "how tf am I going to help all these people at once?" and we get close to burn out on some of those who help the most.

Actually, USUALLY it's the latter. >< I'll stack dungeon runs three deep sometimes. And I'm not the only one who does this.