Incomplete compared to what? There are no hard dependencies between web sites and links fail all the time. The web didn't succeed in spite of this, but because

Incomplete compared to what? There are no hard dependencies between web sites and links fail all the time. The web didn't succeed in spite of this, but because of this. The decision to use one-directional links was a good design choice in retrospect. It has also kept the web agile enough to keep evolving.