Over two weeks I moved six self-hosted services from Docker Compose onto Kubernetes — ArgoCD, supply-chain policy, the whole GitOps loop. Then, in a single day, I moved all six back, and took a seventh with them: a site that had been born on the cluster. Almost nobody writes this part. Not the triumphant migration, but the reversal, and the reasoning that justified both halves. Nothing failed technically. What broke was an assumption I'd been carrying about what Kubernetes is for. Th...