[PopsiclePete]

>Avoid inheritance. Once an object is instantiated, don't change its internal state. etc.

Just embrace Clojure then. You get all that enforced for you, plus the entire Java eco-system.

[weatherlight]

I'm not a huge fan of the Java ecosystem.

Clojure does look really nice and Diatomic looks pretty slick.

Have you used Clojerl? https://github.com/clojerl/clojerl

[didibus]

When you take away Java, the JVM ecosystem is actually really nice. It's ok if you don't like it, I'm just saying, I used to think the same, but since taking on Clojure I've completely changed my mind, and find the Java ecosystem one of the best out there.

Clojure's ecosystem is even better, it improves on the Java one a lot, simplifying most of the warts with the Java one, and like you've brought up, it goes beyond the JVM in having quite a lot of active dialects.

I haven't tried Clojerl beyond just REPL, but it seems quite complete, and the maintainer is very active. ClojureScript is also quite nice, if you prefer the JavaScript/Node ecosystem.

You can also use ClojureCLR if you like the .Net ecosystem better.

And finally there's Babashka which deserves a mention, if you want something more like Python.

You also get to play with Clojure derivatives as well: Janet, Fennel, and Ferret can all be picked up in a day if you already know Clojure.

For me Clojure was a great investment, and it's replaced all my needs in all areas: scripting, front-end, application development (mobile and desktop), command line tools, server side, big data, batch processing, ML, data visualization, etc. Only downside is you will exist within a niche, but that niche has everything I need.

[hota_mazi]

You lose static typing though, and that's a deal breaker with me.

And no, core and other half-hearted attempts at gradual typing from Clojure don't even come close to hitting that mark.