Names need namespaces, else they cannot be unique enough. IPv6 is one such namespace, DNS (on top of IP), another, email addresses (on top of DNS) is yet anothe

Names need namespaces, else they cannot be unique enough. IPv6 is one such namespace, DNS (on top of IP), another, email addresses (on top of DNS) is yet another. They are hierarchical; the namespace of torrent magnet links is flat, and still works fine on top of an ever-changing sea of IP addresses. We already have mechanisms of mapping namespaces like that, and should reuse it. I don't think IP is going to be outright replaced by other transport-level protocols right at the Internet's "waist", but it can be complemented with other protocols there, still keeping the waist narrow.