Why D is not popular enough?

[Seb via Digitalmars-d]

On Friday, 12 August 2016 at 19:29:42 UTC, Shachar Shemesh wrote:
> - Recursive const makes many cases where I can use const in C++ 
> (and enjoy the protection it provides) simply mutable in D.

FWIW HeadConst can be easily done in a library and will hopefully 
soon be in Phobos.

https://github.com/dlang/phobos/pull/3862

Note that the reverse of having a easy to use recursive const in 
library code of C++ is not true.