Emacs is great and I know lots of people who love evil mode. I prefer vim because it comes pre-installed - good for ops. Many of my tools have embedded Lua, so it's great that I can exercise my Lua skills with Neovim. None of my other tools embeds elisp, so for me, elisp is a dead-end.
Neovim won't be preinstalled for a long time. Possibly it never will be. Also, writing Elisp is not far from writing Guile Scheme, and there are many tools that embed Guile.