Deployments become harder when one release changes both the machinery governing a Kubernetes platform and the workloads that depend on it. A new CustomResourceDefinition, admission webhook, controller, or routing API can change what the cluster accepts and how it behaves; a new application image can simultaneously depend on those changes. Argo CD and Argo Rollouts solve different parts of this problem. Argo CD is suited to establishing declarative prerequisites in a deterministic order, while Argo Rollouts limits production exposure as a workload version moves toward stable. Safe delivery comes from composing those responsibilities rather than treating either controller as a universal deployment engine. Argo Rollouts documentation explicitly discourages using Rollouts for infrastructure components such as cert-manager, CoreDNS, and NGINX.