Interesting. We argue that Confluence was the best tool we have and has some of the best search. People would rather write in GDocs, but ironically, the search has been much worse.
Search is the real value though. I never remember where a certain doc is stored. But if I can remember who wrote it or some snippet from it, I can find it. They link to each other well. Another pointer is from Slack; maybe it needs this kind of combo to work well together?