I think there might be confusion on what being “closed” means, as well as “open”.
Forgive me if I am wrong, but having the panels on both edges, as shown in the screen shot from the other thread, is having them “closed” (as in they are always present). I think what Daniel means by “open” is that when you click on the “f” symbol on the right tool bar, an additional panel opens up to display all of the dynamic options available to the user. Clicking on the “f” again “closes” the dynamics panel, and all you see is the single tool bar running down the right side. By saying you can run with them “closed” 99% of the time, means they are always present, just not “open”, because via keyboard shortcuts you can access most of the functionality that these tool bars offer.
Not sure that is correct, or if it makes sense, but that is what I got from both the MOLA presentation video (you should watch it on Youtube if you haven’t seen it), and from what seems to be discussed here.
I think maybe some of the confusion comes from what is the name of the items down the side (tool bar, side panel, etc.)?