Trellon ran its first two CRM Core sprints and we accomplished a lot. We really want CRM Core to be a project shared and owned by a community of people with aligned goals for a CRM framework.
You hit a URL and Drupal gives you a page back. Magic! But perhaps you are wondering, what is Drupal doing under the hood? You know that putting it down to magic is not going to help you to create your own custom modules.
With search data, statistics, cache tables, and log messages Drupal databases can get pretty big, but a lot of the data is disposable. Search data can be reconstructed, caches can be rebuilt, and old log messages can be ignored.