When you develop something you consider not only the features of the language itself, but also the availability of libraries in this particular language. There is a large amount of high-quality C++ libraries and C++ can consume C libraries seamlessly. In most other languages you need to write often unsafe bindings to connect to C.
D simply doesn't have enough libraries to make it a viable choice except maybe for some niche area. For example, there are only 6k D repos on GitHub (https://github.com/search?utf8=%E2%9C%93&q=language%3AD&type...) compared with 340k C++ repos. Also any high-performance code (at least in the area I'm working) is written in C++ or, sometimes, in C.
Thanks for the answer this is exactly what I was looking for. It seems that C++ is in a sweet spot and it is going to be hard to challenge its position.
D simply doesn't have enough libraries to make it a viable choice except maybe for some niche area. For example, there are only 6k D repos on GitHub (https://github.com/search?utf8=%E2%9C%93&q=language%3AD&type...) compared with 340k C++ repos. Also any high-performance code (at least in the area I'm working) is written in C++ or, sometimes, in C.