Originally Posted by Happy Jack
I understand that sentiment. In my mind Bruce will always be Batman, no matter how good Terry McGuiness or Grayson are in the role. But the fact of the matter is that Bruce isn't always Batman. It must continue after him. That's the whole implicit reasoning behind Robin as a character, that he is to be the eventual successor to Batman after Bruce is finished. That's why the passing of the torch works as an ending rather than as the entire story.
The whole reasoning behind Robin as a character is that Batman must have a lighthearted partner by his side to keep him from going that dark path and becoming the Punisher. Batman needs Robin as much as Robin needs Batman.