[internet_points]

Weell, it's not completely untyped, but it is runtime type-checked. There's stuff like `(if (integerp foo)` and `(defcustom ... :type '(choice (const tag "abs" abs) 'integer))`

And then there are more ambitious projects like the static analyzer and language server https://github.com/emacs-elsa/Elsa I haven't tried Elsa yet since it seems to require setting up a package manager like Eask (I don't really understand why I have to install a package manager to run a language server, especially when they support four emacs-specific package managers?) and the docs were very light on whether eglot is supported or just lsp-mode.