[qvrjuec]

With CDK, I can get an ECS service up and running in the same amount of time it'd take to create a lambda function behind API gateway or triggered by SQS/cron. Deploys are easier, cost savings are real, permissions/configuration are the same level of complexity unless you're cutting corners. I'd only use ECS for stuff I know would be high sustained throughput, long duration(>15m) tasks, or things that absolutely need more persistence between executions.

[hooverd]

Serverless is great if you recognize that it's just somebody else's container runtime. I wish there was better tooling for Docker based Lambdas though. I hate whole S3 deployment dance for zip file based Lambdas (yes SAM does it for you now but it's still there).

EC2-backed ECS has a great use case for things that you can run ephemerally in a container but require a persistent data store.