Emacs and Atom share the architectural aspect of implementing most of their functionality in a higher-level language inside of an execution environment. This ha

Emacs and Atom share the architectural aspect of implementing most of their functionality in a higher-level language inside of an execution environment. This has costs and benefits. vi had a much simpler structure and much more limited feature set. vim is obviously a much more capable/flexible editor and has scripting support, but is still predominantly written in C.