For me it was a favorite place to visit every so often. I also really enjoyed mathworld.wolfram.com a few decades ago. (A true shame that he went insane)
Could you elaborate on your reasons for calling Eric Weisstein insane?
I assume you're referring to Stephen Wolfram, not Neil Sloane, but it seems many people would like clarification.
As to Wolfram, assuming this is your focus, nothing undermines one's sanity as reliably as complete success. Not to accept your premise, only to explain it.