I can assume that Lune (and many of the Rust-based Luau runtimes that followed it) were written in Rust mainly because of the existence of mlua <https://github.com/mlua-rs/mlua> and the bindings it provides for Luau. Binding Luau in Zig or C isn't as plug-and-play but is still relatively easy, binding Luau in Go is a nightmare. I'm working on better Luau support for Go, and some others support/binding libraries for other languages are also in development, which is awesome to see and will hopefully bring more language diversity to the Luau ecosystem.