- Implemented API streaming for the `watch-cache`
  
  When `sendInitialEvents` `ListOption` is set together with `watch=true`, it begins the watch stream with synthetic init events followed by a synthetic "Bookmark" after which the server continues streaming events. ([#110960](https://github.com/kubernetes/kubernetes/pull/110960), [@p0lyn0mial](https://github.com/p0lyn0mial))

* Fixed an issue ([#47800](https://github.com/kubernetes/kubernetes/pull/47800)) where `kubectl logs -f` failed with `unexpected stream type ""`. ([#50381](https://github.com/kubernetes/kubernetes/pull/50381), [@sczizzo](https://github.com/sczizzo))

   ([#122231](https://github.com/kubernetes/kubernetes/pull/122231), [@ardaguclu](https://github.com/ardaguclu))
- Added `WatchListClient` feature gate to `client-go`. When enabled, it allows the client to receive a stream of individual items instead of chunking from the server.
   ([#122571](https://github.com/kubernetes/kubernetes/pull/122571), [@p0lyn0mial](https://github.com/p0lyn0mial))

- Added options for configuring `nf_conntrack_udp_timeout`, and `nf_conntrack_udp_timeout_stream` variables of netfilter conntrack subsystem. ([#120808](https://github.com/kubernetes/kubernetes/pull/120808), [@aroradaman](https://github.com/aroradaman))

- Added a method `StreamWithContext` to `remotecommand.Executor` to support cancelable SPDY executor stream. ([#103177](https://github.com/kubernetes/kubernetes/pull/103177), [@arkbriar](https://github.com/arkbriar))