User blog comment:Rappy 4187/Technical Update: June 29, 2016/@comment-24473195-20160704151338/@comment-24473195-20160705153206

Well, if you conducted any usability study on this, you'd quickly find out that it is a very bad experience because ads are shown using javascript, and while the "community module" is briefly shown, it suddenly disappears. While editors will quickly realise that it has been pushed down, anonymous potential contributors will just be confused.

In fact, there is a good chance that they may quickly associate that with yet another disguised Advert since it is in the same rail, and decide that they don't want to click or use it at all.

A simple solution to the cluttered default navigation is to add drop downs, alternatively simply group similar items. I've never really found the point of having both videos and images when Special:listfiles or should theoretically list both. Forum and chat are also related concepts, and could easily be within a submenu, with forum linking to the default one. Community is by far more important than both of those, especially considering that registered users have access to customizable mytools toolbar, and anonymous users don't.