Matt, a big part of that particular point is that a lot of organizations that now find themselves creating content don’t have editors at all. Not only that, they have no idea how to build an editorial capability. Content Strategists can help them establish the team and processes to do this, and in those cases they are playing an editorial role. But most Content Strategists I know would not look to be embedded in that role beyond getting things established.
In addition, I’ve worked with many editors and they all had so many daily responsibilities that they didn’t necessarily have the leisure to step back and think about their content, their processes, and their systems in a holistic, strategic way. And yes, some of them didn’t have the technical knowledge.
I’m not saying there’s no overlap - in fact, I tried to make it clear that I’m getting more comfortable with the overlap - but I do think there’s a need to share the responsibilities, and I do think there are people who’s experience and skills cause them to lean towards one role or the other.
On top of that, there’s definitely a need to clearly articulate Content Strategy concepts, activities, and approaches. So, whether the person responsible for those tasks has a title of “Managing Editor,” “Content Strategist,” or “Chief Content Officer” the discipline still needs to be defined and discussed.