This is not, in fact, the case. Back when Rust was begun, it had some merit, but C++ is a rapidly moving target.

C++ still does not have an absolutely safe subset, but it has a safe-enough subset, and plenty of other merits that will ensure its continued competitiveness.

Rust will continue improving, too, and someday may be as expressive as C++ is today, or perhaps even as expressive as C++ is then. That will be a good day, although by then some other language will be on the rise, its users hoping to displace C++ and, given enough luck and hard work, Rust.

V could be interesting.