How big are y'all that you need InfluxDB?

For one database that receives 100M 600 byte JSON records/day, a single node AWS PostgreSQL RDS instance is handling it effortlessly, and the DBA work is very part-time. We keep year+ of summaries and 48 hours of detail, unloading the rest to S3 as parquet files, queryable by Athena if we need. AFAICT, we're spending <$4K/mon all in, including backups.

p.s. a buddy at a top-3 TV streaming service is also doing this for logging all viewing activity, but with Aurora.