That was way way blown out of proportion. https://lwn.net/Articles/991062/ has a much less somber quote from just three months later:
> Ted Ts'o said that the Rust developers have been trying to avoid scaring kernel maintainers, and have been saying that "all you need is to learn a little Rust". But a little Rust is not enough to understand filesystem abstractions, which have to deal with that subsystem's complex locking rules. There is a need for documentation and tutorials on how to write filesystem code in idiomatic Rust. He said that he has a lot to learn; he is willing to do that, but needs help on what to learn
> Ted Ts'o said that the Rust developers have been trying to avoid scaring kernel maintainers, and have been saying that "all you need is to learn a little Rust". But a little Rust is not enough to understand filesystem abstractions, which have to deal with that subsystem's complex locking rules. There is a need for documentation and tutorials on how to write filesystem code in idiomatic Rust. He said that he has a lot to learn; he is willing to do that, but needs help on what to learn