Yeah, like the other reply, I'd mostly say testing DAGs was an issue. Airflow-related configuration is easy to get wrong and it silently fails a lot. Now that

Yeah, like the other reply, I'd mostly say testing DAGs was an issue. Airflow-related configuration is easy to get wrong and it silently fails a lot. Now that I think about it though, most of the time I spent on testing wasn't caused by Airflow. Testing data pipelines just isn't easy with the current well-known tooling.