Nothing could be worse for the modern Emacs ecosystem than for the tech industry finance vampires ("VCs," "LPs") to decide there's blood enough there to suck.

Fortunately, alien space magic seems immune, so far at least. I assume they do not like the taste, and no wonder.

I'm not sure why you were downvoted. You're right that buffers and everything being programmable makes Emacs an ideal choice for building an AI-first editor. Whether that's something that a typical Emacs user wants is a separate issue, but someone could certainly build a polished experience if they had the resources and motivation. Essentially every Emacs setup is someone's custom editor, and AI features are not different from any other customization.