[pshc]

Rust: Other languages have boundary issues -- action-at-a-distance is evil.

[pcwalton]

I would put it as "Rust: C++ is unsafe, and all other attempts to make C++ safe have made it too high level." (Alternately, "concurrent programming with data races is a kludge, and all other attempts to fix data races have ruled out too much.")

[FreeFull]

Rust: Nothing else offers guarantees of memory safety without garbage collection.