FLEXIcontent has started something that should have been in the core a long time ago. The integration of various plugins. They have taken a stance to get as many extensions to work with their CCK and the advantage - you don't invent another K2 or Zoo and then a family of extensions that only work with those ccks.
Drupal scores over Joomla in this issue which has a native CCK. The closest thing to a core CCK, (i.e. compatibility with all other extensions, ability to create forms, add fields, change the article structure and have own templates) on JED are SEBLOD & FLEXIcontent. FLEXIcontent is beautifully designed and simple, unlike SEBLOD you understand the system almost intuitively. I pity the people who run the support forum for they have to take up issues related to every other plugin in the JED. The templating system requires a special mention. I applaud the effort put in by the team to design such a cool CCK.
