I see that your Kong service mesh using nginx as the underlying proxy. Are there any plans to use Envoy proxy in future? Currently Istio and Linkerd2 are based on Envoy. Unlike nginx, envoy doesnt have an enterprise version where some enterprise features are held off. Also envoy has very good observability and traffic management features.
Yes, Kong's entity configuration (including upstream services) are managed via the runtime, not via reading a config file. This allows for updating proxy configuration without restarting the process itself, allowing for zero-downtime config changes.