Draft: Resolve "Provide tooling to migrate an active cluster from Operator Istio to Helm Istio."

See: #2283

docs/guides/using-bigbang/migrating-istio-in-bb3.0.md

 # Upgrading from the Istio Operator to Helm based Istio 
 
-### *The new service mesh is BETA in Big Bang 2.x and is planned to be completely stable in 3.0!*
+### *The new Istio Helm packages are BETA in Big Bang 2.x and will be stable in 3.0*
 
 ### Step 1 : Remove Istio from your deployment
 Before upgrading to version 3.0 of Big Bang with the new Helm-based Istio packages, we first need to disable Istio and Istio's Operator packages in our 2.x deployment of Big Bang. We do this by disabling the two obsolete [Istio packages in our Gitops configuration](https://repo1.dso.mil/kipten/template/-/blob/main/package-strategy/configmap.yaml?ref_type=heads#L18-22).