I agree QoS is essential to manage a packet network, you need to be able to buffer less time critical packets such as web / data traffic for more time critical

I agree QoS is essential to manage a packet network, you need to be able to buffer less time critical packets such as web / data traffic for more time critical such as voice traffic and so on. I think where that runs into a problem with NN is when you charge a different rate for different levels of service to customers rather than using it to manage your network. The problem with that is that it can potentially lock out innovation. For example, what if a new start up came along to challenge YouTube, if the cost to entry for that startup is prohibitively high, then the incumbent becomes a defacto monopoly.