In a world where Tesla is one of the biggest auto manufacturer AND holds a quasi monopoly on vehicle charging, I think there will be a point where governments will want Tesla Auto and Tesla Energy to not be the same, as they'll hold too many pieces of the puzzle.

But that's highly speculative of course, and it's just a possible development in a scenario where Tesla ends up being incredibly successful in the way I describe. Which of course is very arguable, as people have done for years.