Yes this is what I'm referring too. :)
Maintaining a lot of clusters is super different than maintaining one cluster.
Also please don't actually try to get near those limits, your etcd cluster will be very sad unless you're _very_ careful (think few deployments, few services, few namespaces, no using etcd events, etc).
For anyone unfamiliar with this the "official limits" are here, and as of 1.32 it's 5000 nodes, max 300k containers, etc.
https://kubernetes.io/docs/setup/best-practices/cluster-larg...