If a pipeline fails halfway, most CD systems don’t have the ability to retry. The only option is to restart a pipeline from the very beginning. Now with declarative configs, an intelligent delivery system, the system will detect that staging is already on the desired version and skip that push, allowing you to deliver value to your customers faster.

Hey, an interrupted "make" can always restarted from where it left off without ever having to do a "make clean", so what could go wrong.