That's irrelevant. Look, the C++ committee has decided yet again not to break ABI. That is to say, they have affirmed that they DO NOT want backwards incompatib

That's irrelevant. Look, the C++ committee has decided yet again not to break ABI. That is to say, they have affirmed that they DO NOT want backwards incompatible changes. So suggesting a way to make backwards incompatible changes is of no interest to the C++ committee. They don't want it and they have said so more than once.