* Fix [transition between NotReady and Unreachable taints](https://github.com/kubernetes/kubernetes/issues/43444). ([#44042](https://github.com/kubernetes/kubernetes/pull/44042), [@gmarek](https://github.com/gmarek))

* The Kubelet's deprecated `--allow-privileged` flag now defaults to true. This enables users to stop setting `--allow-privileged` in order to transition to `PodSecurityPolicy`. Previously, users had to continue setting `--allow-privileged`, because the default was false. ([#63442](https://github.com/kubernetes/kubernetes/pull/63442), [@mtaufen](https://github.com/mtaufen))

### Avoiding permanent beta

From Kubernetes 1.20 onwards, SIG Architecture will implement a new policy to transition all REST APIs out of beta within nine months. The idea behind the new policy is to avoid features staying in beta for a long time. Once a new API enters beta, it will have nine months to either:

* Support vSphere SAML token auth when using Zones ([#75515](https://github.com/kubernetes/kubernetes/pull/75515), [@dougm](https://github.com/dougm))
* Transition service account controller clients to TokenRequest API ([#72179](https://github.com/kubernetes/kubernetes/pull/72179), [@WanLinghao](https://github.com/WanLinghao))

* Remove deprecated flags: --low-diskspace-threshold-mb and --outofdisk-transition-frequency, which are replaced by --eviction-hard ([#48846](https://github.com/kubernetes/kubernetes/pull/48846), [@dashpole](https://github.com/dashpole))

objects created with non-empty `caBundle` fields which are invalid or do not contain any certificates will not appear in discovery or serve endpoints until a valid `caBundle` is provided. Updates to CustomResourceDefinition are no longer allowed to transition a valid `caBundle` field to an invalid `caBundle` field, because this breaks serving of the existing CustomResourceDefinition. ([#124061](https://github.com/kubernetes/kubernetes/pull/124061), [@Jefftree](https://github.com/Jefftree)) [SIG API Machinery]...

- The `--cidr-allocator-type` option set to `CloudAllocator` for `kube-controller-manager` will be deprecated and removed in a future release. Users are advised to transition to and explore the available options provided by their external cloud provider. ([#123011](https://github.com/kubernetes/kubernetes/pull/123011), [@dims](https://github.com/dims))

    * Introduce a RuntimeClass v1beta1 API. This new beta API renames `runtimeHandler` to `handler`, makes it a required field, and cuts out the spec (handler is a top-level field).
* Transition CSINodeInfo and CSIDriver alpha CRDs to in-tree CSINode and CSIDriver core storage v1beta1 APIs. ([#74283](https://github.com/kubernetes/kubernetes/pull/74283), [@xing-yang](https://github.com/xing-yang))

* The apiregistration.k8s.io (aggregation) is now generally available. Users should transition from the v1beta1 API to the v1 API. ([#58393](https://github.com/kubernetes/kubernetes/pull/58393), [@deads2k](https://github.com/deads2k))

 - Support for the seccomp annotations `seccomp.security.alpha.kubernetes.io/pod` and `container.seccomp.security.alpha.kubernetes.io/[name]` has been deprecated since 1.19, will be dropped in 1.25. Transition to using the `seccompProfile` API field. ([#104389](https://github.com/kubernetes/kubernetes/pull/104389), [@saschagrunert](https://github.com/saschagrunert))