It can be learned by a programmer knowing only imperative C-family languages in a couple of hours, meaning I can hire any average developer and make him product

It can be learned by a programmer knowing only imperative C-family languages in a couple of hours, meaning I can hire any average developer and make him productive in less than a week. Not the same as teaching pure functional style with pattern-matching and prolog's syntax. Go is also much more efficient. It also produces static executables and can be easier to deploy -- or not, depending on the exact situation. It handles strings nicely -- anything other than Erlang's approach to strings is nice. Erlang has other advantages, though. 99.9999999% uptime and hot code replacement are easier with it, for instance. Their ideal niches don't completely overlap.