- Enabled `kubectl get -o kyaml` by default. To disable it, set `KUBECTL_KYAML=false`. ([#133327](https://github.com/kubernetes/kubernetes/pull/133327), [@thockin](https://github.com/thockin))
- Enabled in-place resizing of pod-level resources.  
  - Added `Resources` in `PodStatus` to capture resources set in the pod-level cgroup.  

   *
   * @param expectedSize the number of entries you expect to add to the returned map
   * @return a new, empty {@code HashMap} with enough capacity to hold {@code expectedSize} entries
   *     without resizing
   * @throws IllegalArgumentException if {@code expectedSize} is negative
   */
  @SuppressWarnings("NonApiType") // acts as a direct substitute for a constructor call

   *
   * @param expectedSize the number of entries you expect to add to the returned map
   * @return a new, empty {@code HashMap} with enough capacity to hold {@code expectedSize} entries
   *     without resizing
   * @throws IllegalArgumentException if {@code expectedSize} is negative
   */
  @SuppressWarnings("NonApiType") // acts as a direct substitute for a constructor call

* Deprecate deleting-pods-burst ControllerManager flag ([#28882](https://github.com/kubernetes/kubernetes/pull/28882), [@gmarek](https://github.com/gmarek))
* Add support for terminal resizing for exec, attach, and run. Note that for Docker, exec sessions ([#25273](https://github.com/kubernetes/kubernetes/pull/25273), [@ncdc](https://github.com/ncdc))

  There was a table set out under a tree in front of the house,
and the March Hare and the Hatter were having tea at it:  a
Dormouse was sitting between them, fast asleep, and the other two
were using it as a cushion, resting their elbows on it, and talking
over its head.  `Very uncomfortable for the Dormouse,' thought Alice;
`only, as it's asleep, I suppose it doesn't mind.'

  The table was a large one, but the three were all crowded