[great_psy]

What kind of things would you use this to simulate ?

Is this to make sure services are wired up with permission and communicate properly before you deploy or what is the use case ?

Also, why not have a dev environment where you can test things on the real thing (ideally with smaller size instances to save $)

[giza182]

Intergration testing is one. You can run this in your ci/locally to speed up tests. Or just for local dev. We do this with localstack[1]

[1] https://www.localstack.cloud/

[ozarkerD]

Yep integration is my use case as well. It’s nice to not have to worry about setting up real infrastructure for testing client code, parallel execution if you’re on a team, clearing out state each run, etc…