I'm quite disappointed by the "Continuous Delivery" section.

I expected tools that let you model a Continuous Delivery pipeline, like http://concourse.ci/, https://go.cd/, or Jenkins with the Pipelines plugin (directly included in Jenkins 2.0+, iirc).

Tools like Maven and Ant would be only a step in such a pipeline.

I guess this reinforces the OPs point that the whole devops nomenclature is very fractured, and folks use terms from this field as they please.