[terseus]

Given that YAML it's a configuration language I'd say that not being turing complete it's a feature, not a bug nor a limitation; I always want my language files to be declarative to not suffer the perils of logic.

Edit: Also, I don't see the need for a turing complete language for something like docker compose, if you need something really complex you can always script a docker-compose.yml generator with all the logic and complexity you need.