[ssorallen]

Maybe one problem with a lot of Wiki software is they make the filetree-like structure seem too important with huge filetree sidebars and constantly make you consider the vastness of your outdated collection of knowledge. Why care if there are really old pages as long as their update times are very apparent?

For our engineering team we've been happy with StackOverflow Teams. Some of the questions are probably just as outdated as the author complains about, but with the design of SO it doesn't matter much. We use tagging heavily and make sure to include keywords in the content of the questions and answers.

One downside of SO Teams is that you are subject to SO's search engine instead of Google or your search engine of choice since your team's pages are private.

(I'm not affiliated with StackOverflow, I'm just a customer.)