I brought up envsubst because it’s a simpler, cleaner, and often overlooked option for variable substitution.

> Not that I haven't had the need, I've use jsonnet with libk8s at scale. But if you're asking the question this simply, you probably don't need it

In my view, Jsonnet isn’t an improvement - it’s complicated to learn, cumbersome to use, and prone to mistakes.

That said, if an organization decides to adopt any specific tool, I believe consistency in tooling, design, and practices is more important than the tool itself.