Dhall really feels like the future of configuration as code. It provides strong typing and outputs to a flat map. It’s still early though and the tooling is a bit ugly.
You can embed enough logic that it feels usable.
The biggest selling point for me was the typing though.
I've used Dhall in production, pushed it fairly hard and can say with utmost certainty it's be an absolute pleasure. We use it as our application configuration format and derive fairly intricate Kubernetes resources from our app config.
