I agree, the most useful parallel implementation is nearly always mapreduce or pipes and filters. At the moment, Clojure's not that great for pipes and filters

I agree, the most useful parallel implementation is nearly always mapreduce or pipes and filters. At the moment, Clojure's not that great for pipes and filters. The STM solution is brilliant, but atm it's all or nothing. The Rust model of being able to transmit something which ceases to be valid on the sending thread would be a useful addition to the current semantics. I think they're still thinking about the correct abstraction for event streams.