The Darpa/Arpa net was envisaged to have many connections and be resilient by virtue of redundancy. The internet has been taken over by commerce and the immense redundancy has been seen as over-capacity.

The two facets are the same. It is just that commerce can't cope with redundancy so everything is piped into a few backbones. The come-on is speed.

The truth is that the internet is not massively redundant any more. If you want to slow things down you just flood the system. Be it water down the valley, cars on the highway or big meals day in day out.

The London Ambulance response network suffered a similar fate on a busy day. Tandem computers quoted 11 million GBP for a system that was eventually bought for 2 million. Tandem (clue is in the name) are experts in fail-safe systems. Fail-safe can be bought with redundancy, more cheaply and with less risk than cleverness. But it still costs.