What you described is, actually, here and called... Haskell! You need COW things like in Closure? Here in unordered-containers they are. You need SIMD processi

What you described is, actually, here and called... Haskell! You need COW things like in Closure? Here in unordered-containers they are. You need SIMD processing of vectors? Here in vector package it is. Parallel processing? parallel strategies. Channels like in Go? You bet right, it is on hackage, in stm package. Green threads are much more greener in Haskell than in Erlang and Go (about twice as small overhead compared to Erlang). I keep repeating that what is usually a language feature in regular languages, is often just a library in Haskell. Which, as you rightly noted, piss many people off.