Andrei Alexandrescu points out one major issue being that D went with a GC first approach, and even though the GC is optional, the library support isn't as good.
For at least some problems people will not want to use a GC, and D's story there isn't as good as Rust's.
For at least some problems people will not want to use a GC, and D's story there isn't as good as Rust's.