Re: On the face of it
You are missing the point that "habit" is more efficient for those of us settled into it. We don't have to waste time/thought on task-distracting mechanics of how to perform basic mouse and screen management for the sake of the latest "efficiency" fad. Frequent UI change is anathema to people who want to focus on what they are doing without wasting time and effort on the how, once they have found that which "just works".
If you can start off with something so wonderfully efficient, or change over to it, more power to you (literally!), but for me, if ain't broke, don't "fix" it.
To each their own.