[nickbauman]

I'd argue the most interesting problems are those that end up having some sort of shared state requirement. Clojure handles this nicely with language primitives like atoms and refs, which helps avoid the pitfalls of the locking paradigm found in Go and Java, for example. What does D do in this case, then?

[earenndil]

There are the basic primitives found in c/any language, but there are also synchronized{} (or synchronized (my_mutex) {}) blocks that essentially automagically handle locking/unlocking and let you just mutate around willy-nilly across threads (in that block). There are also atomics, although the syntax for using them is a bit clumsy (foo.atomicOp!"+="(7), anyone?).