We use FIDL on host (Linux & macos) platforms via the overnet project. As far as language ecosystems go, as swetland rightly points out below, being runtime agnostic is important to us. FIDL being easy to implement generators for new runtimes is part of that. There is some nascent documentation on porting runtimes here: https://fuchsia.dev/fuchsia-src/development/languages/new?hl...