I don't know what "the choice of what they want to do with their network" means. Is there something that you are able to do with a dynamic IP address that you a

I don't know what "the choice of what they want to do with their network" means. Is there something that you are able to do with a dynamic IP address that you are somehow unable to do behind NAT+PCP? (I mostly hear people complain about stuff that makes no sense, like "I can't do peer to peer connections", when the core problem there was already 100% solved by PCP.)