The chips have fallen; within companies that treat software development process as a competitive advantage, CD has won out over iterations, release cycles, sprints and scrum.
Amazon was deploying code changes on average every minute - five years ago. Facebook releases multiple times a day. From Github to LinkedIn to Netflix, the list goes on and on. Continuous Delivery isn't something for startups or cowboys or unicorns. HP reduced development costs by 40% over agile. Wired called it "the software revolution behind gushing profits."