This infrastructure/configuration distinction is very hazy when it comes to services like Lambda or Fargate, where you just specify your code artifact and there

This infrastructure/configuration distinction is very hazy when it comes to services like Lambda or Fargate, where you just specify your code artifact and there's essentially nothing more to do. It's not clear that it's a net benefit to introduce additional tooling beyond CloudFormation/Terraform for deploying to these services. It's certainly not strictly necessary.