DOT - An Architecture for Internet Data Transfer

The idea here is to have a service for data transfer over the Internet. They propose that a clean interface for data arbitrary data transfer which separates the mechanism for content negotiation from data transfer.

My objection is that such a unified service introduces a new single point of failure into the network.

Not to mention the standard criticism that this is a pie in the sky, with not practical, implementable solution that could be used to improve the data transfer mechanisms in use today.