Earlier quoted context omitted.
C or Rust would be perfect. No GC runtime, no name mangling, fast, great ffi story. Rust needs to start edging out Go for new tools. Kubernetes, Envoy, IPFS, etc. would have benefitted from it. It might not have been time four years ago, but it's time now.
Rust will start edging out Go once Rust becomes easier than Go to prototype/start projects. Rust is a great language, but right now I can start a project in Go and have someone else start a project in Go and have something up and working in a week. Rust still takes significantly longer to learn and/or find skilled developers for. Go is up there with Python in terms of "Get something out now ".
Even in a globalized developer market a smaller developer force is a risk.
In German we have a saying "to die in beauty" (in Schönheit sterben), does that translate? Your boss wants to get things done in due time and I see Go outcompete Rust in this respect.