D is a work of love by WalterBright and the community. I like to think of D as a true successor to C++ when people compare Go to a C++ alternative. It is between Rust and Go but it doesnt do away with Object Oriented programming or the many paradigmns that exist for different programming approaches. I usually tell people if you can grasp C, C++, C# or Java you are going to understand plenty of Go.

Rust has a larger learning curve, Go gains plenty of traction over this simple fact.

You hear it often enough "I wanted to learn Rust but Go was simpler to get into" but if those same people gave D a shot they might never look back. D is best understood once you start hacking away at D code because you will appreciate the beauty in D. Different people love different things about it. I love that it is compiled and dont get phased by the optional GC, it doesnt stop Java, C#, or Go from being awesome...