Finally after having sketched out this visualization idea in notebooks for years, it has come into reality. This example highlights the utility of d3-component for recursive visualization components.
The idea here is to extend the notion of a pie chart to represent hierarchical data. Each slice gets expanded into a “sub-pie” whose area is equal to the area of the slice. The sub-pie slices get broken out recursively.
Have some fun and play with it on Blockbuilder!