There are already provisions being made for Rust to be a first-class language for coding in the Linux kernel.
Rust is more protective of resources than C++, making it more like
Java. Unlike Java, however, it's relatively easy to run "straight to the metal". which is important when doing OS-level coding.
I believe that Rust has also been found useful in coding webapps, where again safe management of resources in a C++ like language is a matter of interest.