Wikipedia has become famous, or perhaps infamous, for its intolerance of new content. That is to say, there's a dedicated group within Wikipedia's community that prides itself on pruning content from Wikipedia rather than being inclusionist on new content.

The deletionists are getting renewed attention after proposing that the dwm entry be deleted because it's a a "non-notable window manager." While dwm may less notable than other desktop environments and window managers, most users would probably find it more useful than not to have an entry describing dwm in Wikipedia.

This is not a new phenomenon