Most of these things don't sound like they need OS support. Just writing Go libraries and using Go alongside the existing system can provide a statically linked

Most of these things don't sound like they need OS support. Just writing Go libraries and using Go alongside the existing system can provide a statically linked environment, no need for the application write to use select/poll or worry about memory safety, and garbage collection. It doesn't have to be "Go all the way down" since you won't be modifying your environment at runtime.