Yes, such indices (S2 & H3) are widely used for providing a index in databases, so geospatial features that are close by in the world and stored in nearby databases rows. https://cloud.google.com/bigquery/docs/grid-systems-spatial-...

Thanks. I always enjoy when geospatial topics show up on here. My background it geo, but unfortunately I have slowly drifted away. Geohash is about where I left off in the same general realm of concepts, so S2 / H3 are essentially new to me as well.