It is really hard to tell through the publishing interface what code or items (data elements, rules, extensions, etc.) are currently deployed to each environment.
It would be nice to have a UI that says what items are deployed on which environments.
For example, in the screen shot, I created a library, built it, and then submitted for approval and it currently sits in the submitted queue. So, now my question is “What is deployed to which environment right now?” I imagine that my changes are live on the dev environment. And I also imagine that my changes are live in the stage environment as well. But it doesn’t say that. That is just what I assume from using DTM previously.