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What ever happened with EDN (pronounced "eden") from the Clojure people? https://clojure.github.io/clojure/clojure.edn-api.html https://github.com/edn-format/edn

I always thought that seemed like a nice alternative data format to JSON. Anyone using this it in the wild?

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It got supplanted by Transit [0] as an interchange format. Both are only really used within the Clojure community. I use Transit for internal-facing APIs.

[0] https://github.com/cognitect/transit-format

Clojure programmers use it everywhere. I suspect almost nobody else does though.

Even if you're a clojure shop, you've got the issue that at your system boundary, everything else the world accepts json and/or XML, and nothing supports EDN/transit. So your data needs to be serialisable to one of those anyway, at least if it crosses the boundary. There is such a thing as a network effect, even in data serialisation formats...

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