When I was working for a fintech company, we built a suite of specs for a ledger. Based on those specs, we could generate data. And it wasn't just some set of key/value pairs with completely randomized numbers. It would generate "a proper" ledger, where every number in a transaction depends on other transactions.

We used that generated data to render UI locally and on the non-prod environments.

Using the same specs we built data validators, we re-used the specs to validate data in the input fields in the UI, which is totally bonkers. How the heck do you achieve code re-use between completely incompatible ecosystems - in our case, JVM and Javascript? Even Nodejs doesn't always let you re-use code between the backend and the front. Clojure does.

Using the same specs, we've built property-based/generative tests.

Before, I never experienced the joy of creating such robust, predictable, and reliable software with any other (statically typed or otherwise) language.

I'm not saying you cannot build a similar thing (or even better) with Scala or Haskell (or some other PL). The simplicity of how Clojure allows you to write stuff like that - is just incomparable.

Once again, I'd repeat the point I made in the parent thread: Clojure has an excellent price/quality ratio for building software. ROI from hiring Clojure devs, in many cases notably higher.