Eventually, some form of this paradigm is going to win. In practice, applications need state on both the client and the server. The server needs the authoritat

Eventually, some form of this paradigm is going to win. In practice, applications need state on both the client and the server. The server needs the authoritative state information (since the client is untrusted), but the client needs to be able to re-render in response to user interaction without a round-trip.