That's a really good question! Because DBOS is backed by Postgres, it scales as well as Postgres does, so 10K+ steps per second with a large database server. That's good for most workloads. Past that, you can split your workload into multiple services or shard it. Past that, you've probably outscaled any Postgres-based solution (very few services need this scale).

The big advantages of using Postgres are:

1. Simpler architecturally, as there are no external dependencies.

2. You have complete control over your execution state, as it's all on tables on your Postgres server (docs for those tables: https://docs.dbos.dev/explanations/system-tables#system-tabl...)