That is a failure; the old namespace no longer meets your needs. My point is abstracted over all of that. There is no namespace solution where that can't possibly happen. Switching from one solution that has problem X (and more generally than the article describes) to another that still has problem X isn't a solution, and given that problem X can't be solved, that means there is no solution. In the interests of not spamming replies, this is also my reply to dcreager.