Sorry I misread your first comment. Its still possible for dynamic languages to have auto-completion. There's way more information available at runtime than at

Sorry I misread your first comment. Its still possible for dynamic languages to have auto-completion. There's way more information available at runtime than at compile-time. Besides, IDEs tend to have the entire world in most autocompletions, which is not useful either. There would be no IDE here, you'll probably still write code from within Excel and advanced users will use separate source files to leverage their editor of choice. The novices you mention will not want to leave Excel. A dynamic runtime with reflection is all you need to give a friendly experience. That doesn't prevent type hints, inference or autocompletion.