Drupal's steep learning curve filters out far too many smart, motivated people who could benefit from Drupal. We see it all the time in the Drupal.org forums, in my "State of Drupal" surveys, on Twitter, when talking to customers, and on the web. Even though we've made significant progress with making Drupal easier to use, a lot of work is left to be done. With other content management systems such as Joomla!