It's bugged me for years. Just wondering if I'm in the minority.
Do you mean the revelation that the Vaults were never meant to save anyone and that they were social experiments instead? No, I thought that revelation was pretty cool actually.
Vaults being just what they were generally thought to be, i.e. a safe place for portions of the poplace to wait out the nuclear winter before repopulating the surface, then to me that's just, ho hum, boring. The Vaults are then all the same except for geographical location, and not much beyond that.
But the Vaults instead being social experiments and not meant to save anyone makes me wonder ... When I come across Vault X in my explorations, what am I going to find happening inside this one? Who did these experiments? Why? Where are they now? etc etc There's just more mystery and intrige this way. Also, since they were not meant to save anyone, and still managed to make communities after the war, like Vault City, it's much more impressive to me that they ended up doing so on their own.
Edit: Ok, now I'm confused as to why the OP quoted me in his reply but then didn't say anything themselves ....