Java vs. Kotlin is a different matter. It's still an open question if C++ even could match Rust's features, not to say if it (the committee) wants to, and the answer seems to be "no".
The feature parity question goes both ways: rust won't ever be able to express some things that are possible in C++.
The feature parity question goes both ways: rust won't ever be able to express some things that are possible in C++.