I agree. I find working with templated YAML so cumbersome that I ended up creating a tool (Cels - https://github.com/pacha/cels https://github.com/pacha/cels) b

I agree. I find working with templated YAML so cumbersome that I ended up creating a tool (Cels - https://github.com/pacha/cels https://github.com/pacha/cels) because of it. I like Jsonnet and Starlark but in practice I don’t usually need a new programming language for most use cases. Most of the time I just want to create a base document and apply patches to do modifications. That simplifies everything a lot. The experience of writing pure YAML is actually not that bad (a couple of things about the format are really questionable, but it is workable). I find that problems appear from the complexity of the solutions you have to add to adapt documents to different environments.