Many thanks Mamy! I agree that the logic of **FlowVar** looks difficult and isn't user friendly. IMHO, simple (but powerful) multi-threading would be a killer feature of Nim. So, I'd like to ask the Delphic Oracle what the future of multi threading will be in Nim.
I'll definitely try _Weave_ and hopefully it will be part of Nim proper soon. I am retired now, but I imagine that most people in industry and the academic world will be reluctant to build large houses on a ground with uncertain future.