separate namespace allows: -- easier reconfig of just the gateway -- TLS secrets and domain name management is isolated, for better security -- simplified configuration -- multiple versions of the ingress can be used, to minimize upgrade risks - the new chart uses the default namespace service account, and doesn't require additional RBAC permissions. - simplified label and chart structure. - ability to run a pilot dedicated for the gateway, isolated from the main pilot. This is more robust, safer on upgrades...

   set of functions like discovery, rich layer-7 routing, circuit breakers,
   policy enforcement and telemetry recording/reporting
   functions.

  > Note: The service mesh is not an overlay network. It
  > simplifies and enhances how microservices in an application talk to each
  > other over the network provided by the underlying platform.