Started working on a JS version a few weeks ago [1]. Even with 20% of the features it’s already so useful we’re building systems with it. And not just config - model all the things!
Overrides and inheritance are a world of pain. Unification and commutative operations restore sanity to the actual work of coding with a domain representation language because WYSIWYG. And you get type safety for your domain model.
The project is still at the “Read the Source, Luke” stage so caveat emptor until we get a respectable release out.