This tutorial describes how to overprovisioning of cluster nodes for scaling and failover. This is desired when you have work load that need to scale up quickly without waiting for the new cluster nodes to be created and join the cluster.
A similar problem occurs when crashing a node from the Hyperscaler. This must be replaced by Kubernetes as fast as possible. The solution can be overprovisioning of nodes
..read some more on Cluster Overprovisioning.