Excited to see that finally someone has written an imperative language in a functional runtime. Normally it's the other way around - countless Lisp implementations running in C, because those are trivial to write.

The most important feature of Eden IMHO is the copy-on-write semantics for collection that it inherited from Clojure. I hope this extends to nested structures like JSON data (it should). This opens the door to not having to distinguish between passing by value and passing by reference, although atom() is still available for mimicking references if needed. This opens the door for content-addressable memories and rapid application development where the user can focus on business logic, with less time wasted on the more mundane aspects of programming like resource management.

I've written about all this stuff countless times in previous comments so kudus to Eden for being one of the first languages I've seen to start getting this stuff right!