The main benefit of multicast announce-listen approach is its resiliency, especially since the context for this research is the Internet. The sheer number of entities connected to the network is enormous, making stability unlikely.
Hosts go off-line or become portable or mobile.
Nor is there stability in routing among networked objects, since the topology of the network is ever-changing and routes are sometimes transient. Thus, we promote a design that does not require consensus. Each individual mmcc trusts its own catalog of information as a reflection of its connectivity to the rest of the world.