Working large systems overwhelmingly started out as working small systems, with working systems all in-between.
This is not an endorsement of TDD, but shows that there is a correctness path from small to large, without usually needing to take large leaps in-between, and taking such a path tends to be the most successful strategy.
This is not an endorsement of TDD, but shows that there is a correctness path from small to large, without usually needing to take large leaps in-between, and taking such a path tends to be the most successful strategy.