The result of Agile (and DDD, TDD etc.) comes back to The Mythical Man Month: you're gonna throw one away. So plan the system for change. And due to Conway's l

The result of Agile (and DDD, TDD etc.) comes back to The Mythical Man Month: you're gonna throw one away. So plan the system for change. And due to Conway's law: plan the organization for change. From those ideas you derive Agile (make an organization easily changeable) and the tactical part of DDD (all the code architecture meant to be often and easily refactored).