That's a bit silly, the C++ standard library is pretty small ("the intersection of your needs, not the union" is what they say), and it's often not even really

That's a bit silly, the C++ standard library is pretty small ("the intersection of your needs, not the union" is what they say), and it's often not even really good at the few things that it does. Whether that's core stuff like hashmaps and iostreams, or more niche stuff like std::regex.