Given the choice, I would rather use D, because experience has taught me that tracing GC are a productivy boom, even in systems programming, also D provides all the necessary tooling for doing GC free programming when required to do so.

However it lacks the commitment of a proper roadmap and big corporate support, and that sadly damages its image.

Rust on the other hand, while quite relevant for bringing affine types into mainstream, still isn't what I would like to use across the various domains I work on.

Ironically, I see Java and .NET getting the missing features (AOT, low level unsafe code, better control over memory allocation) that will eventually allow me to use them in system level programming scenarios, where I would choose D today.