That's precisely the parent's point. The Vim model (I'll exclude vi from the discussion since it lacks core aspects of Vim's composability like text objects, an

That's precisely the parent's point. The Vim model (I'll exclude vi from the discussion since it lacks core aspects of Vim's composability like text objects, and almost no one should be using it) is about having a largely inflexible editing language built off of composability. The Emacs model is built around infinite extensibility instead. That's why implementing Emacs in Vim would be fundamentally at odds with the principle of Vim, but it's very possible to implement the Vim model in Emacs, and Evil does a nice job.