What problem does this feature solve?

Previous versions of ECharts has Chord diagram examples displaying ribbons with varying sizes, weighted to their data values.

@sjcobb Originally posted #8743 (comment), suggesting the Circular Layout of the Graph diagram is appropriate as a replacement, but that example only displays single pixel line connections, not ribbons with weighted widths.

I see that issue is requesting the same...
@jeffersonswartz Requested this in ECharts 3 in #10098
@linxingyun Requested this in ECharts 4 in #8743
@ataft Requested this in ECharts 5 in #8743 (comment)_

What does the proposed API look like?

If examples that mirror the following could be produced, that would be great:
https://datamatic-public.github.io/echarts-2.1.10/doc/example/chord1.html#-en