This is only a suggestion. GCC 13.2 have nearly full C++23 support & (we once had GCC 11 with C++20). So I just want that GCC 13.2 (or 14) has C++23 support enabled with -std=c++23 (as another GCC 13 compiler option, or when GCC 14 is released, or when GCC 11 is back).