It looks like while the core kernel and a lot of components are written in C++, there are a number of components written in Rust: https://fuchsia.googlesource.c

It looks like while the core kernel and a lot of components are written in C++, there are a number of components written in Rust: https://fuchsia.googlesource.com/garnet/+/master/Cargo.toml https://fuchsia.googlesource.com/garnet/+/master/Cargo.toml One of the advantages of a microkernel architecture is that it is relatively easy for different components to be written in different languages.