[rdtennent]

Well if any of the O(N^2) connections has unacceptable latency, you'd understand why a server is sensible. Reducing computation won't improve latency in the connections. One has no flexibility with clients but a server can be located wherever good connections are available.

[weepy]

There is flexibility - in the P2P model if one of the clients has bad latency - their buffer gets increased to prevent drop outs. How is a server better in this scenario?