We published an article on why internal documentation matters and how to build it properly: https://xwiki.com/en/Blog/internal-documentation-best-practi... The core issue: "later" usually means "never." Teams lose institutional knowledge, onboarding takes 3x longer than it should, and people keep making the same mistakes because nobody wrote down what worked. What the article covers:

Why documentation decay is structural, not cultural Faster onboarding, fewer repeated errors, better handoffs How to build documentation that survives team turnover Technical architecture that prevents fragmentation

We're also running a webinar (Feb 25, 16:00 CET) on the technical side: structuring, maintaining, and scaling documentation systems using XWiki (LGPL, built since 2004). Live Q&A included.