At In23Hours, we publish a knowledgebase of new products that we pick randomly, by our choice. We expect to publish knowledgebase of two products, every week.
Startups have so many priorities, a knowledgebase is often on a low priority. Our experience shows that a majority of products can have a Minimum Viable Knowledgebase in less than 23 hours. Of course we are not talking about huge products that are comparable to, say Skype, Basecamp, or LinkedIn.