That wasn't my point really. Of course emacs lisp is turing complete so yeah, you could probably pilot an airplaine using an emacs AI, it's still pretty far fet

That wasn't my point really. Of course emacs lisp is turing complete so yeah, you could probably pilot an airplaine using an emacs AI, it's still pretty far fetched though. On the other hand the features described in the page I linked are mostly already built into emacs, at most you need to flip a couple customization switches to get the same idea. Basically: remove the toolbars, enable ido-mode, use tramp for remote editing. The splitting thing is built in although you'll need to redefine a couple functions to get the exact behaviour shown in the gif (nothing very fancy though).