Java/C# territory is already better than D, even for low level programing, because in the last 10 years that D spent changing projects to atract the next wave to the language "because we need X for Y", they grew out of where they were in 2010, when Andrei's book came out.

D doesn't even have hardware vendors shipping commercial embedded SDKs for baremetal development like Java, C# and Go have in 2022.