Actaully, the other 67% sites are in the mix demographics of old site built with html4/xhtml (which takes the chunk of the figure) and developers building their own CMS using MVC framework, Cakephp and Netbeans. If WordPress really want to get the remaining 57%, they need to do something about the admin dashboard to accommodate the ; 1. The WordPress community, 2. Other developers. 3. The educational community. For instance, if WordPress Core Developers can allow niche website to be built with custom admin menu link back-end that takes away the other admin menu links not necessary to the site owner will make the outside developer have a rethink just like the way they are doing now with the rest api creation (a big plus). Hence, plugin developers can begin to build niche plugins that makes admin backend looks like the way it should e.g a school website built with WP should have the school features in place like the way bloom, Jetpack, CoursPress Pro and many intuitive plugins are created with visible admin features for the plugin occupying a nice chunk of space of main body when it is clicked in the admin backend. This simply helps the User Experience of the site owner and ability to manage the site easily and tell others about it. Hence, WordPress admin will be clean with custom menu link, easy to navigate, understand and manage. Also, ability to add roles to the plugin is another core solution because as an admin and the implementor and site builder, I can view all admin menus but can set role for the plugins installed for the client and make others invisible. In this way, most educational and business people cum developers alike will just have a cleaner way to manage content and build their plugin for niche website without decoupling WordPress