The biggest problem in C++ always comes from the fact that the there's no underlying stable ABI to take care of everything (and there cannot be due to performan

The biggest problem in C++ always comes from the fact that the there's no underlying stable ABI to take care of everything (and there cannot be due to performance reasons), and that build options are so important and affect the ABI. Most C++ projects are inherently multi-language system and bring the complexity of all languages to their build systems.