[Legogris]

They do have Batch, which IIRC was originally only for ECS, for that scenario.

It's quite horrible in many ways but not I don't think any of it is really because the ECS model is somehow inherently unsuitable for stateful long-running workloads, it's Batch being a bad product.

Both ECS and Batch are just leaky abstractions enough that some unknown unknown or forgotten nuance will come along and bite you when you least need it and make you question the value proposition.