Comment by HaroldCindy

There's at least one more to add to the pile, Google's Fuchsia is primarily written in Rust and aims to support the Linux ABI through "starnix".

See https://fuchsia.dev/fuchsia-src/concepts/components/v2/starn... and https://fuchsia.googlesource.com/fuchsia/+/refs/heads/main/s...