Why do C++ programmers are not interested in D?

[Pavel Shkadzko]

On Tuesday, 19 November 2019 at 13:06:29 UTC, Mark wrote:
> In addition to what others have written, here's another thing 
> to consider: D's "killer feature" is its metaprogramming 
> capabilities, but I don't think most C++ programmers, rightly 
> or wrongly, care that much about metaprogramming. I think the 
> reason Rust hasn't replaced C++ (so far, anyway) is similar - 
> it's killer feature is "memory safety by default" but most C++ 
> programmers that I know don't consider (lack of) memory safety 
> to be a major problem in the language.

Sorry, could you please elaborate what do you mean by D 
"metaprogramming"?