As of Haystack 2.24, there are improvements to Pipelines that remove the need for OutputAdapter in some cases. e.g.:

• Pipelines support connection and automatic conversion between ChatMessage and str types. No need for an OutputAdapter
• Pipelines now support list wrapping: a component returning type T can be connected to a component expecting type list[T]. Pipeline automatically converts a list[ChatMessage] produced by the LLM into a str expected by the retriever, which previously required an OutputAdapter component.

After these changes, some code examples across all the docs pages need to be updated.