I agree that it seems a bit pointless unless you're running a huge batch and that I don't think reading from channels in a for loop should be referred to as pro

I agree that it seems a bit pointless unless you're running a huge batch and that I don't think reading from channels in a for loop should be referred to as promises, but I've written CLI tools where running batches of jobs in parallel and printing the results in order is desirable. I don't think it's a generally undesirable thing. Edit: not quite parallel: I mean with a limited pool of workers, or a partial ordering, or something else that means there's a reason to return results early.