What happens when you assume the alter ego in perpetuity? Where does the "original ego" go?
Is there a term for when you believe that that "original ego" was killed by something else? Be it killed by "the world" or some serious life event or revelation or something.
What the parent posters are talking about is when you have two personalities: the original and the mask, but the mask stays on so long it becomes the new permanent personality. The original "ego" is gone and already replaced.
"ego death" sounds like a loss of the only personality. There's no alternate.