True, but I don&#x27;t think it negates anything I wrote.  You don&#x27;t keep development migrations simple so they&#x27;ll run quickly; you keep them simple so they&#x27;re easy to create and understand.  Writing migrations (whether automated or manual) for production is a separate task and even a separate skill from designing the database structure itself, so there&#x27;s no reason why the two need to be (or should be) combined.