It was a resounding endorsement in 2020, but the proof is in the pudding. So far I am not impressed. It is also not something I think is terribly important. Even if they managed to improve memory safety in the kernel using Rust (but I assume improvements in C tooling will have a much bigger impact), the reality is that for the overall Linux community (but maybe not Google and co.) others things would be far more important (such as a proper responsible disclosure process, the recent failures were pretty bad).