If he is wrong and such tools are of small import then it isn't highly important that Emacs has such functionality. If he is correct and such functionality is essential then all of existing Emacs becomes merely a freemium teaser for Emacs 2021 Professional Edition with AI where they will provide only a fraction of the total value but collect most of the money from the ecosystem.

Worse its not even a license forever, nor even for a period of time. It's priced by the word.

https://beta.openai.com/pricing