It is scalable. In terms of service scale and integration with Kubernetes, we are quite happy with the clusters of this setup and how Istio inter-played with them. We don't have traffic similar to the internet, such as for social networking, but we do have traffic that is significant in terms of our internal stuff, and it still scaled quite well. As you set up these new clusters, you can see that it balances the load quite well and registers itself. Otherwise, you'll have to do all of this work manually when you bring up a new service. You have to let the load balancer know where the new service is and then divert traffic to that. All this is, kind of, handled for you, which saves quite a bit of effort on our end. These things are clearly driven by traffic volumes. As we bring more and more services into the farm, then, of course, these things will have a bearing on how many instances run Istio. At the moment, pretty much all of them run Istio, and we are happy with it. We are not planning to get off the network. It has, kind of, worked for us if you look at what we've done so far.