D is a very good language, avoiding most of the pitfalls of C++. I have wondered why D isn't picking up. Even Facebook has abandoned Warp [1]. Other than the lack of corporate backup,
The complexity of the language gets out of hold as we move forward.
DMD is the official compiler, but it doesn't optimize as much as LDC/GDC does. LDC/GDC is not available on the Enterprise platforms on which C++ is used (at least on the servers with RHEL/CentOS).
There are 3 different compilers and the resource is not concentrated on improving just one. I agree that competition is good for health, but when things are not picking up why not focus the efforts on making the better the best (probably GDC/LDC)?
Albeit few community members are very helpful and humble, personal attacks are a common thing in the forum.
The forum gives some hints [2], [3]
[1] https://github.com/facebookarchive/warp
[2] http://forum.dlang.org/post/vlosobeqnvfrfuriedpv@forum.dlang...
[3] http://forum.dlang.org/post/hjaiavlfkoamenidomsa@forum.dlang...