Migrate is horribly broken! Migrate works awesome! Both are true. (Yes!) So Keith Dechant reported migrating a live Drupal 7 site to Drupal 8. Melissa Anderson is migrating a Drupal 6 site and gets mostly bugs. How is this possible? Well, Keith was coding his way around bugs, not just using what core provided (this should be obvious since we do not yet provide Drupal 7 sources in core) and Melissa had a site builder approach to it.