> In a wiki, at least I can follow the structure to find relevant pages

Wow! You have much more disciplined coworkers than most of us, then. I've been at my current employer for about 13 years now. We've gone through 3 or 4 different wikis. Right now we're split between Confluence (worst wiki software I've ever used) and an in-house solution. I can't find a god damned thing on either one. They're both awful, and so were the predecessors. Maintaining any kind of documentation takes work and our employer just doesn't give us enough time to do that and our jobs.