what do you mean that the American Museum of Natural History is grossly outdated?
Did you explore the new Rose Center for Earth and Space and see the new space show or visit the new Hayden Planetarium. What about the Hall of Planet Earth (my daughter and I spent an entire afternoon in that section alone!) or the the Hall of Human Biology and Evolution? Yes, the core exhibits are still the same (and in excellent condition) as they were 5, 10 or even 20+ years ago. But the museum is constantly updating exhibits and adding new permanent and temporary exhibits. It's not unlike WDW, in which the base attractions are the same, evoking warm and fuzzy memories, yet new items are added to keep you going back. Maybe it's just me (yes I am a AMNH member, as well as a member in a handful of other NY area museums), but I get a kick out of seeing the giant bug window, remembering that creepy-crawly feeling I would get as a child on a school field trip; being able to share my childhood memories with my children while making new memories with them as well.
But I digress... as with all thing in life: to each his own!
-mle