With Lua, you don't even need to export a config object, the Lua script is the config object. I do think there is some promise to this - see Neovim for example.

With Lua, you don't even need to export a config object, the Lua script is the config object. I do think there is some promise to this - see Neovim for example. There are a lot of downsides though, because now you've got a leaky config language instead of a leaky config interpreter.