S2 is attractive, but the corpus of use cases outside the Pokemon Go community is quite small. The sheer number of companies and hobbyists using H3 for analytics across a wide spectrum makes it much more attractive than S2. H3 functions are built directly into Snowflake DB for example, and h3 extensions / plugins are widely available. I tried and tried to use S2 in my company but the lack of available use cases and examples made it tough to adopt.