In late 2023, Harvard Web Publishing (HWP) had about 12,000 sites using OpenScholar, a distribution of Drupal 7. We decided to keep about 1,800 of them, migrating them to Drupal 10.
This session will give an overview of the process: the background, the timeline, and mostly how HWP managed the scale of the project. It will briefly mention the 10,000 sites that were left behind.