Dont be pessimistic - you are still free to used it.

I used EDN outside of Clojure. The system needed a relatively large amount of config files, and I chose EDN as a better JSON. Looks familiar to everyone, but supports comments - the primary motivation for that choice.

JSON-5 allows a single trailing comma. EDN simply ignores commas. You can have them, trailing or not. But they are really redundant and incur visual noise.

Perhaps EDN can also be improved, but that's a good format. Convenient.