The Drupal content management system is an amazing piece of software. It’s an open source project that people all over the world contribute to and it’s currently celebrating its 20th birthday. It’s a rare beast in the computing world that survives for two decades as a single system. Depending on who you ask, Drupal powers something like 2% of all websites on Earth. Drupal can do everything from simple “brochureware” sites to elaborate platforms that integrate with dozens of other services. However, all that power and flexibility comes with a price.