I would liken it to the Game of Go (pun intended). You have a very small number of elements: chan, go, >!, <!, alts!. The learning curve is a bit steep because

I would liken it to the Game of Go (pun intended). You have a very small number of elements: chan, go, >!, <!, alts!. The learning curve is a bit steep because you have invest some time unlearning patterns you've picked up from traditional UI programming. But once you cross over the hump and you realize what is possible with just these few tools a whole vista of possibilities opens up. I'm sure the fans of go-lang would agree. Another analogy - Alan Kay compares software engineering to architecture and how so much engineering is brute force (think pyramids). core.async (really CSP) is like an arch (think gothic cathedral). Common UI patterns no longer seem arduous - and UI patterns which once seemed far out reach can be accomplished with a reasonable amount of engineering effort.