How do you realize that you have stopped using a resource? Can there be cases when you're hesitant to remove a resource just yet, because you want a possible rollback to be fast, and then it lingers, forgotten?
With our GitOps patterns, anything you could call an "environment" has a Git branch that reflects "intended state".
So a K8s namespace named test02, another named test-featurebranch, and another named staging-featurebranch, all have their own Git branch with whatever Helm, OpenTOFU, etc.
With this pattern, and other patterns, we have a principle "if it's in the Git branch, we intend for it to there, if it's not in the Git branch it can't be there".
We use Helm to apply and remove things -- and we loved version 3 when it came out -- so there's not really any way for anything to linger.
