> You can't run AWS lambda or DyanmoDB locally too (well you can but it's a hassle). So by that logic, we shouldn't use them at all. No, applying the logic to

> You can't run AWS lambda or DyanmoDB locally too (well you can but it's a hassle). So by that logic, we shouldn't use them at all. No, applying the logic to something like Lambda would mean implementing handlers like: function handle(lambdaRequest, lambdaContext) { return myFunction( stuffExtractedFromLambdaRequest(lambdaRequest), stuffExtractedFromLambdaContext(lambdaContext) ); } Then there's no need to go through the hassle of running Lambda functions locally; since we can just run `myFunction` locally instead. Dynamo isn't the same, since it's just a service/API that we call; we don't implement its logic, like we do for CI tasks, Lambda functions, etc. Whilst you're right that it's a hassle to run DynamoDB locally (although not too bad, in my experience); that's also not necessary. It's fine to run code locally which talks to a remote DynamoDB; just set up the credentials appropriately.