Node utilization is the easiest Kubernetes cost to graph, but often not the largest cost to change. A cluster creates upgrade, policy, security, observability and support paths that the organization must operate for as long as the platform exists.
Start with the problem Kubernetes should solve
A varied service estate, frequent deployment, strong isolation needs and shared platform standards can justify Kubernetes. A small set of predictable services may run more simply on managed containers or serverless platforms.
Count operational paths
Cluster, node, ingress, DNS, certificate, secret and policy changes each need owners and recovery procedures. The human queue matters as much as unused CPU.
Treat upgrades as normal operations
Test add-ons, policies and workloads against the next version on a schedule. Delaying upgrades turns routine maintenance into a high-risk migration.
Keep a simpler runtime available
Not every workload needs the same control plane. Publish selection criteria and support a limited alternative so a low-complexity service does not inherit platform costs it cannot use.