>… neovim has added a Lua engine into the core (increasing complexity that way) and creating a DX-poor bridge for common vim configuration things so that startup scripts can be written in Lua.

And one can look at the explosion of new Lua-based plugins that have been developed because of it. People hated Vimscript. Now that there is a better first class language (guaranteed! Not dependent upon the host environment or compilation target), NeoVim is gaining some of the plug-in functionality that had previously been Emacs exclusive.

Edit: fixed autocorrect