The question is the cost of supporting it (assuming this is a problem needing fixing) as it has far reaching implications in all of the added complexity to all the abstractions layered on top of it.

I'm not making a good/bad argument that one is better than the other. The two languages have widely different usecases and rationale in the language design. But I'm not convinced C++ is (or can become) very Pythonic given the complexity it must support at all the basic levels.