Update CRD defaulting docs for GA

content/en/docs/concepts/extend-kubernetes/api-extension/custom-resources.md

@@ -174,7 +174,7 @@ Aggregated APIs offer more advanced API features and customization of other feat
 | Feature | Description | CRDs | Aggregated API |
 | ------- | ----------- | ---- | -------------- |
 | Validation | Help users prevent errors and allow you to evolve your API independently of your clients. These features are most useful when there are many clients who can't all update at the same time. | Yes.  Most validation can be specified in the CRD using [OpenAPI v3.0 validation](/docs/tasks/access-kubernetes-api/extend-api-custom-resource-definitions/#validation).  Any other validations supported by addition of a [Validating Webhook](/docs/reference/access-authn-authz/admission-controllers/#validatingadmissionwebhook-alpha-in-1-8-beta-in-1-9). | Yes, arbitrary validation checks |
-| Defaulting | See above | Yes, either via [OpenAPI v3.0 validation](/docs/tasks/access-kubernetes-api/extend-api-custom-resource-definitions/#defaulting) `default` keyword (beta in 1.16), or via a [Mutating Webhook](/docs/reference/access-authn-authz/admission-controllers/#mutatingadmissionwebhook-beta-in-1-9) | Yes |
+| Defaulting | See above | Yes, either via [OpenAPI v3.0 validation](/docs/tasks/access-kubernetes-api/extend-api-custom-resource-definitions/#defaulting) `default` keyword (GA in 1.17), or via a [Mutating Webhook](/docs/reference/access-authn-authz/admission-controllers/#mutatingadmissionwebhook) (though this will not be run when reading from etcd for old objects) | Yes |
 | Multi-versioning | Allows serving the same object through two API versions. Can help ease API changes like renaming fields. Less important if you control your client versions. | [Yes](/docs/tasks/access-kubernetes-api/custom-resources/custom-resource-definition-versioning) | Yes |
 | Custom Storage | If you need storage with a different performance mode (for example, time-series database instead of key-value store) or isolation for security (for example, encryption secrets or different | No | Yes |
 | Custom Business Logic | Perform arbitrary checks or actions when creating, reading, updating or deleting an object | Yes, using [Webhooks](/docs/reference/access-authn-authz/extensible-admission-controllers/#admission-webhooks). | Yes |

content/en/docs/tasks/access-kubernetes-api/custom-resources/custom-resource-definitions.md

@@ -628,7 +628,7 @@ Additionally, the following restrictions are applied to the schema:
 
 These fields can only be set with specific features enabled:
 
-- `default`: can be set for `apiextensions.k8s.io/v1` CustomResourceDefinitions. Defaulting is in beta since 1.16 and requires the `CustomResourceDefaulting` feature gate to be enabled (which is the case automatically for many clusters for beta features). Compare [Validation Schema Defaulting](/docs/tasks/access-kubernetes-api/extend-api-custom-resource-definitions/#defaulting).
+- `default`: can be set for `apiextensions.k8s.io/v1` CustomResourceDefinitions. Defaulting is in GA since 1.17 (beta since 1.16 with the `CustomResourceDefaulting` feature gate to be enabled, which is the case automatically for many clusters for beta features). Compare [Validation Schema Defaulting](/docs/tasks/access-kubernetes-api/extend-api-custom-resource-definitions/#defaulting).
 
 Note: compare with [structural schemas](#specifying-a-structural-schema) for further restriction required for certain CustomResourceDefinition features.
 
@@ -781,10 +781,10 @@ crontab "my-new-cron-object" created
 
 ### Defaulting
 
-{{< feature-state state="beta" for_kubernetes_version="1.16" >}}
+{{< feature-state state="stable" for_kubernetes_version="1.17" >}}
 
 {{< note >}}
-Defaulting is available as beta since 1.16 in `apiextensions.k8s.io/v1` CustomResourceDefinitions, and hence enabled by default for most clusters (feature gate `CustomResourceDefaulting`, refer to the [feature gate](/docs/reference/command-line-tools-reference/feature-gates/) documentation).
+To use defaulting, your CustomResourceDefinition must use API version `apiextensions.k8s.io/v1`.
 {{< /note >}}
 
 Defaulting allows to specify default values in the [OpenAPI v3 validation schema](#validation):