This was posted in December. I don't think anything but experimental projects have been added to the kernel yet using rust, but it is still significant. Linus is also not opposed to rust. The primary issue in December was that building for Kernel required experimental features in the rust language. Most of those features, I'm guessing, will become stable and released soon, if it hasn't happened already.
#^Rust in the Linux Kernel: 'Good Enough'Quincy Larson: Rust is now an official language for Linux development.🎉
C and C++ have lead to lots of memory safety issues over the years. Rust can prevent these. A lot of new Linux code will be in Rust.