[pcwalton]

D doesn't have two competing libraries anymore. There's just one, Phobos.

Regarding Rust, Rust has lightweight green threads just like Go does. (Go's scheduler is currently more mature though.)

[dorolow]

Regarding D, that's good! I always thought D was very cool, but the two libraries thing kept me away till now. Maybe I'll have to check it out again.

It seems like Rust never ceases to impress.