In my experience, they don't, you can just run more of them and you can stick them behind a load-balancer (regular HTTP reverse proxy). You can scale both etcd

In my experience, they don't, you can just run more of them and you can stick them behind a load-balancer (regular HTTP reverse proxy). You can scale both etcd and apiserver pretty easily. Of course you have less control in cloud environments, I have less experience with that.