Yes, I know (although they promoted it as a "systems language", but it was not really defined what that should mean in the beginning), but it is a restriction, you don't have in Rust. Basically, Rust can do everything Go can do, but not the other way around. That _might_ help to make a decision for a language.
It seems to be an idiom shift. Systems means connected parts, go concurrency does just that, connecting parts through channels. But it's not `systems` as in bare metal electronic chips systems. More like IT `system`.
