> How does one omit threading if it's not really part of the language spec to begin with? Care to expand? Not the OP but I can't resist answering. Threading is

> How does one omit threading if it's not really part of the language spec to begin with? Care to expand? Not the OP but I can't resist answering. Threading isn't really part of the language proper, but as a lazy language can make flow control from language or library indistinguishable that isn't a very important distinction. What matters is that GHC has an excellent threading implementation in its runtime and that the compiler has the primitives to build the Haskell concurrency libraries on.