It lets C++ almost return to C-style duck typing. Whether that's really what you want and whether that is the best approach to solve the problem at hand is a m

It lets C++ almost return to C-style duck typing. Whether that's really what you want and whether that is the best approach to solve the problem at hand is a matter of preference and the problem space. It is also allows for a "gradual typing" approach that Dart 1 had.