In this question I found out uses for being able to deselect the active object.
You can basically use the active-but-unselected object as a transform pivot point for the rest of the object selection without affecting the active object. Which is great.
You click-select the object to make it active, then border-deselect it. It's now unselected but remains active.
But here you can see the behavior is different in in Edit Mode.
While this doesn't seem like a big deal with a vertex selection it would be nice with an Edge or Face to modify around a face's pivot point without actually modifying the active face.
I've been able to force deselect an active element through python but I was wondering if there was a way without scripting.