[munificent]

> I'm an ardent supporter of executable config languages

Me too. I feel like there should be some eponymous law about this. Every declarative language that starts out trumpeting "simplicity and not being Turing complete is a feature!" ultimately grows features until it is an imperative language, or gets replaced by one that is.

If you're gonna get there anyway, you may as well design for that instead of bolting on features poorly after the fact.