> D has a package manager. C++ has none that is popular in its community. Therefore, using a third-party library is many times easier.
This comes up all the time in reference to C++. C++ doesn't need a package manager because it has excellent support from distro package managers. Most libraries are in the system package manager. And yes, sometimes you need a newer version of a package or one not quite widely-used enough to be in the system package manager, in which case you need to do compile it yourself or install it manually. But that is a problem common to all package managers and there is nothing about D which will make it any easier.
This comes up all the time in reference to C++. C++ doesn't need a package manager because it has excellent support from distro package managers. Most libraries are in the system package manager. And yes, sometimes you need a newer version of a package or one not quite widely-used enough to be in the system package manager, in which case you need to do compile it yourself or install it manually. But that is a problem common to all package managers and there is nothing about D which will make it any easier.