That's completely fair and accurate. The challenge is handling the genuine concurrency model then, but both Go and Erlang have good tools for doing just that.

That's completely fair and accurate. The challenge is handling the genuine concurrency model then, but both Go and Erlang have good tools for doing just that. So it kind of comes down to whether you want to shave off ceremony for concurrency or for all monadic/sequencing operations at once. Honestly, that's a tradeoff.