Today, after over 8 years, we say thank you and goodbye to Drupal 6.
Drupal 6 is now officially "end-of-life".
Drupal 6 launched in 2008 and was the backbone behind many of the projects that made Drupal famous. At its height, there were over 300,000 Drupal 6 sites that were reporting to Drupal.org.
Below you can see Drupal 6's popularity during its first 3 years of Drupal 6. The red line shows Drupal 6's growth and the green line shows Drupal 7.