Even though I don't write any Rust, I still think Rust on Linux is important. I rather learn and deal with Rust than with C/C++, and I too, hope it succeeds.
C/C++ is like water/alcohol; certainly they look very similar to an uninvolved observer, and one can mix them easily, but they differ drastically. One is an utterly simple life substrate, another is a toxic and hallucinogenic but potent rocket fuel.
For the record, Torvalds has always vehemently resisted any attempts to use C++ in the kernel. I completely support his position.
You are probably writing your comment via lots of software written in C++. It's a great language with lots of flaws introduced by legacy decisions that would be made differently today.
Rocket fuel, as I said. Dangerous, powerful, indispensable in certain kinds of projects. Up until the advent of Rust, there was no viable alternative for C++ in large, long-running, performance-critical codebases, like browsers or game engines.
(I say this as a fan of Haskell and Rust, and a daily user of Python, Typescript, and elisp. Last time I wrote production C++ was in 2021, like 50 lines.)