Yep. It's more of a concept of cooperation than anything else. Which, since it's not a concrete thing, makes it harder for people to understand. But then there's specific practices that arose out of trying to drive best practices in Ops at the same time (like IaC, II, CattleVsPets, automation, etc) so now DevOps "means" a jumble of slightly related things.

We really need some new terminology.