I've been busy with a migration work for my client recently. There is an established website built with some proprietary CMS with a decent amount of articles / pages, different categories and user comments. My team was hired to make a complete migration from this money-sucking old-fashioned proprietary CMS to a modern shiny open-source Drupal 7. I like this kind of tasks. It’s always a pleasure to help people get rid of an old and proprietary technologies.