Nitpic: Clojure delegates most things to the VM. The subtle difference that it works just fine on JS engines and CLR. Arc and Golang would not be a good idea.

Nitpic: Clojure delegates most things to the VM. The subtle difference that it works just fine on JS engines and CLR. Arc and Golang would not be a good idea. I'm not trying to be overly negative, but Arc does have it's issues, the main thing being that Arc does not always work, meaning you would need some tool to hunt down leaks. RC is also slower than GC for several reasons, and when you require a runtime anyway for goroutines, you might as well include a GC, especially since Go can have a precise GC.