You create a new instance and run the same setup. If your workload is extremely variable, something like k8s with auto-scaling makes sense. But a lot of applic

You create a new instance and run the same setup. If your workload is extremely variable, something like k8s with auto-scaling makes sense. But a lot of applications (maybe the majority?) have very predictable loads and you don't always need new services. When you're at the size of large corps with hundreds/thousands of services, then k8s is amazing. If you're not even close to that number, it's very likely premature optimization.