It just works until the plastic housing on the receptacle cracks, and you can no longer get a good electrical connection. The big problem is that the jack acts

It just works until the plastic housing on the receptacle cracks, and you can no longer get a good electrical connection. The big problem is that the jack acts as a lever that can transmit enough force into the receptacle to destroy either one or the other rather than breaking the connection. And the more ring conductors you want to add, the longer the lever can become. I have been really happy with all my devices that have standardized on USB for charging. In contrast, Apple's proprietary 30-pin and Lightning (and MagSafe, while I'm at it) just make me think they're being colossal dicks, doing whatever TF they want, rather than meaningfully contributing to a standards consortium and licensing their patents to it.