The other strength that Go has over D is that Go, being used by Googlers, is much more likely to have better networking support. Two examples come to mind: HTTP2 support (Go was used for either the first or second implementation of that and has standard library support), and TLS cryptography, where Go has it's own suite written by experts, where a good portion of the non Microsoft ecosystem relies on OpenSSL. For web/app servers, CLI tools, and networking stuff, I think Go has a strong set of options. Go also has a nice cross platform story for that subset of programs (networking and CLI tools).

That set of good internet sensibilities is what attracted me to Go in the first place, and why I still like working in it in my spare time. If D has a similarly strong story in that area, I'd love to know about it.