The std::meta stuff are only ever running at compile time, so I don't think this would actually interfere much?

now that a lot of std:: is constexpr, who knows how much of it will get pulled into compile time by std::meta stuff (I do not. I am asking). I know of no way of using different std libraries, one for compile time and one for target. Meaning, using this c++ variant without std library shipped with the compiler just got even impossiblier.