Those of us who have experience traveling the long dark roads of migration projects between Drupal’s previous major version releases may, understandably, be feeling some trepidation at the impending release of Drupal 9 (potentially as soon as June 3, 2020). 

The journey from Drupal 7 to Drupal 8 in particular was a major challenge for many developers, with massive API changes, a completely new theme layer, and a fundamental OOP architecture.