- 'The `IPv6DualStack` feature gate for external cloud providers was removed.
  (The feature became GA in 1.23 and the gate was removed for all other
  components several releases ago.) If you were still manually
  enabling it you must stop now.' ([#116255](https://github.com/kubernetes/kubernetes/pull/116255), [@danwinship](https://github.com/danwinship))

address, and port flags have been removed and replaced by bind-address, insecure-bind-address, and insecure-port, respectively. They are marked as deprecated in [#36604](https://github.com/kubernetes/kubernetes/pull/36604), which is more than a year ago.  ([#59018](https://github.com/kubernetes/kubernetes/pull/59018), [@hzxuzhonghu](https://github.com/hzxuzhonghu))

* The alpha `--init-config-dir` flag has been removed. Instead, use the `--config` flag to reference a kubelet configuration...

### External credential providers

Kubernetes client [credential plugins](https://kubernetes.io/docs/reference/access-authn-authz/authentication/#client-go-credential-plugins) have been in beta since 1.11, a few eons ago. With the release of Kubernetes 1.22, this feature set graduates to stable. The GA feature set includes improved support for plugins that provide interactive login flows.