Any good joomla website needs a comment system so users can express their opinions in certain articles, blog categories, etc. The problem is that joomla with such extensions, components, plus modules, plus plugins turns into a slow, obese website with very slow page load times. All these extensions have the hassle of creating conflicts with other joomla extensions, a huge mess of errors. There is also the learning curve of how to use these components, where users can post, who can post, what is spam, moderated or not, etc. One word Obsolete!!