1) An official Helm chart is coming very soon. We (Astronomer) have a commercial platform that aims to solve this completely including observability, configuration and deployment. Happy to team up to improve Airflow's open-source k8s story if you have some ideas.

2) Yes the UI is outdated, and not responsive. We're going to kick off a process to build a new modern UI in Q3 (a full-featured Swagger API is being built now, which the new UI will rely upon.)

3) I personally think catchup true is a fine default, but whatever. Generally when I launch a new DAG I want to generate some historical data using the DAG.

4) Airflow has tags now since 1.10.8 https://airflow.readthedocs.io/en/latest/howto/add-dag-tags.... - we decided not to do folders.

5) That's true, but it also provides a low bar to entry. There are some guides written on unit testing DAGs, but I agree we should be a test-first community. On my roadmap.

6) Celery w/ KEDA is pretty nice - check out https://www.astronomer.io/blog/the-keda-autoscaler/

7) I personally love the PythonOperator for simple DAGs. Agree that DockerOperator (KubernetesPodOperator if you're running Airflow in K8s)

8) Yes, logging UI will be improved in the UI rewrite. What's your favorite UI for this?

9) That feature is in the queue https://github.com/apache/airflow/issues/7911