[chaotic-good]

>> Maybe I'm getting this all wrong, but aren't the leaves also representing chunked data, which is compressed.

Leaf nodes contain data from one series (this data should be read together) and SSTable with time-series data contains many series and there is no guarantee that all these series will be used by the query.

>> The Prometheus solution also sequentially places compressed chunks for the same series.

I'm not really that familiar with Prometheus internals, especially with indexing part. As I understand it doesn't align writes so there is a lot of write amplification on the lower level that translates to cell degradation and non-optimal performance, but I can be wrong here.