Speaking in generalities, this structure tends to do better at the "lower" levels of your PKB, as we tend to desire a little bit of encapsulation/abstraction in order to work with big ideas. Chunking your knowledge into "domains" that are loosely coupled to other domains, but are also highly-cohesive, richly connected graphs within, can be a great strategy to get the benefits of an organic, flexible structure without being swamped by the complexity.