New ask Hacker News story: Ask HN: If you were rewriting Emacs from scratch, what would you do differently?

Ask HN: If you were rewriting Emacs from scratch, what would you do differently?
5 by volemo | 4 comments on Hacker News.
Don't get me wrong, I'm not planning on creating an Emacs killer, nor suggest anyone do that. But, hypothetically, what are some fundamental pitfalls of this foundational application?