> something like Golang's concurrency

That's wildly overselling it. Closure core async was completely incapable of doing the one extremely important innovation that made goroutines powerful: blocking.

Assuming "blocking" refers to parking goroutines, then blocking is possible.

  (let [c (chan)]
    ;; creates channel that is parked forever
    (go
      (<! c)))

  c := make(chan interface{})
  // creates goroutine that is parked forever
  go func() {
    <-c
  }()

Can you elaborate? As far as I'm aware if you pull from an empty nchannel it wikl be blocking ubtik it gets a value.