> It's not Rust, but: golang

This is a false choice. Go and Rust are not replacements for each other. They both have qualities which make each better suited for different environments.

Rust is actually capable of replacing all uses of C, Go's runtime will generally be an impediment to using it in certain cases.

Also I would argue that there are entire classes of bugs that are still available in Go that are not in Rust, that make it less suited for security. Null pointer exceptions, and unchecked errors are the two that come to mind.