A Python ingestion job should not have to choose between an open Iceberg catalog and a governed SQL engine forever. We connected dlt directly to Apache Polaris through Iceberg REST, then sent the same full, incremental, and SCD2 loads through SQE over Trino HTTP and Arrow Flight SQL. The result is one service-principal identity, one catalog, three front doors, and a test suite large enough to expose the bugs hiding at batch boundaries.