Why is D unpopular?

[Dr Machine Code]

On Friday, 5 November 2021 at 15:30:51 UTC, Bruce Carneal wrote:
> On Friday, 5 November 2021 at 13:42:44 UTC, Ola Fosheim Grøstad 
> wrote:
>>[...]
>
> I agree that language evaluation occurs in a multi-dimensional 
> space (no single factor) but I believe that D has already 
> "bested" C++, to pick one competitor, in several ways.  For 
> example, in performance critical areas it has allowed 
> individuals, or small groups, to quickly develop software that 
> equals or outperforms the world's best.  Roughly a (hard 
> performance / development cost) metric.
>
> [...]

What's Mir and MLK?