Elisp for Emacs, Lua for those on Neovim...

Definitely more control than guessing the right JSON, or breaking that YAML file. Plus, you get completion, introspection, and help while editing the config because you're in a code-writing environment. Bonus for having search and text manipulation tools under your fingertips instead of clicking checkboxes or tabbing through forms.

Reading this does make me think about how exploring settings in emacs `M-x config` settings is actually better than I would expect. So it isn't like you can't also have the checkboxes and forms.