In my experience, wikis are all doomed to becoming out of date and not a trusted information source, because the really important information ends up being in p

In my experience, wikis are all doomed to becoming out of date and not a trusted information source, because the really important information ends up being in peoples' heads, or in code, or something like that. The wiki can only give you A) a 10,000-foot view of a system, or B) the details of that system as it existed.... two or three years ago. Honestly, this doesn't really have anything to do with the original post, because it's happened in techie-only or techie-dominated companies I've been in. Anyone else had this experience?