>>First off, a REPL IS a CLI. drscheme, allegro lisp,squeak,dolphin smalltalk,idle. Most of the REPLs I use aren't CLI and are the better for it. I certainly

>>First off, a REPL IS a CLI. drscheme, allegro lisp,squeak,dolphin smalltalk,idle. Most of the REPLs I use aren't CLI and are the better for it. I certainly don't see this as a discoverable vs expressive debate. It is expressive(the app) vs expressive(the user) debate. A GUI allows the App to be more expressive. CLI has only one way of expressing anything to the user, slabs of text.