"Of what type?" Of the type of the messages you're sending. Which can either be an interface for multiple messages, or you can use multiple channels with one t

"Of what type?" Of the type of the messages you're sending. Which can either be an interface for multiple messages, or you can use multiple channels with one type each. I've done both. This is not an important question when actually programming in Go. "But most importantly, channels are local to the process, so you need glue to make it networked." This is an important consideration if you are using Go. Although I would observe that it isn't so much that "channels don't do network" as that "channels are a local tool"; e.g., we do not complain that OS mutexes are not "network capable", because they're intrinsically local. Network locking uses different solutions, and we don't really consider etcd a competitor to a local "lock" call. But there are dozens of message busses in the world now, and Erlang's isn't really all that competitive modulo its integration.