Continuous Delivery culture and team habits
Effective Continuous Delivery depends on a healthy team culture. If the team does not live by the principles and recommendations Continuous Delivery makes, the best technology doesn't help much. Pipelines that implement automated deployments have little value if there aren't sufficient software tests verifying the deployed software. The most eager CI server can't help much if developers seldom check in their changes, making integration hard and cumbersome. Full test coverage and code quality checks have no value if the team doesn't react to failing tests or, in the worst case, set the test execution to ignore.
Responsibility
Continuous Delivery starts with being responsible for the software. As mentioned earlier, for the DevOps movement, it is not sufficient for developers to just build their software and let other teams deal with potential errors. The development team that creates and owns the application knows about its responsibilities, used technologies...