Terraform is an awesome user space tool.<p>I&#x27;ve been using the CF custom resource to manage a ton of stuff (hundreds of clusters and thousands of apps) and it&#x27;s excellent.<p>It&#x27;s amazing that the service supports custom anything, and the create, update delete pattern is perfect.<p>Replacing a custom resource with the right resource can be challenging. My strategy is to not do it.<p>Create all new stacks the new way and have good tools to migrate parameters and data from an old stack to a new stack.