It's already this way in a sense. There are many things that seem more "solid" to me in Vim because there is a default implementation that is baked into the edi

It's already this way in a sense. There are many things that seem more "solid" to me in Vim because there is a default implementation that is baked into the editor. In Emacs, there are several different libraries and various language modes may interact with one or another of those libraries. Many of the various libraries are included in the default Emacs distribution. For example, (IIRC) there are 2 or 3 "folding" libraries that are in Emacs, while Vim just has folding baked in. Sometimes this makes Emacs seem less consistent to me than Vim does.