When are C++ macros beneficial? [closed]

As wrappers for debug functions, to automatically pass things like __FILE__, __LINE__, etc:

#ifdef ( DEBUG )
#define M_DebugLog( msg )  std::cout << __FILE__ << ":" << __LINE__ << ": " << msg
#else
#define M_DebugLog( msg )
#endif

Since C++20 the magic type std::source_location can however be used instead of __LINE__ and __FILE__ to implement an analogue as a normal function (template).