Introduction to the Introduction Over the last few years we’ve built lots of Drupal 8 sites, and some Drupal 9 ones too, both for our clients and for ourselves. As such, we’ve taken a keen interest in (read: faced many challenges with) the Configuration Management subsystem. This was a major new component in Drupal 8, and so, while it’s functional, it isn’t yet mature. Of course, the vibrant Drupal developer community jumped in to smooth the rough edges and fill the gaps, in what has since become known as CMI 2.