Definitely sounds cool and as I understand it there are ton of Prefect users on AWS. (I see you are a main contributor to the fargate agent so you know first hand 🙂 ). I’m a GCP convert now but used to be an AWS gal, hope to be able to help!
Did a quick read up on fargate vs batch, I see in the docs for fargate what you mean about the several minutes; for Batch, the way it is described it kind of feels like Batch could be implemented as its own executor (at least, in Prefect-only terms; you may be considering something broader than that) as opposed to a total analogue to dask-kubernetes that is running dask clusters.
Sorry if this should be obvious, but what is it that makes a non-kubernetes dask deployment attractive here, instead of running dask-kubernetes on Amazon EKS?