I know that the trend right now is to simplify things, especially user interfaces, creating a more streamlined and focused experience. While that may be appropriate for many website and web apps, it really is not that appropriate for a support guide or knowledge base, where you are trying to find interconnected information.
In this case, it is useful to see related posts, categories, and external links along with the individual article. This extra information often helps you find information you need but did not necessarily know how to search for.
So, we may not be the prettiest or simplest website around, but hopefully the usefulness of interconnected information outweighs the clutter that it may bring to the site.