In every team I've worked with, DevOps didn't do any of the development, while being called DevOps. The only thing they were developing were automation for build, tests and deployment. Other than that, they're still a separate role from development. The main difference between pre-devops days and now, is that operations people used to work in dedicated operations teams (that's still the case in some highly regulated places, e.g. banks), and now they work alongside developers.