I regularly work with Clojure.

This is probably an unpopular opinion in this thread, but despite having worked with it for years, I still don’t much like it, mostly because it’s far too terse and the syntax is so far removed from that of C-based languages. The other day I wrote a Java-based DTO and it was refreshing how clear and verbose everything was, despite the almost comical volume of code it took in comparison to what similar functionality would look look like in Clojure. Plus, the state of tooling in Clojure is not the best.

I would also add that while you might initially do well with something like Clojure, it may be difficult to maintain, especially if you plan to make it a legacy product with O&M support in the future.