Reproduction Steps:

1. Install Unity 6.5 alpha (version 6.5.0a1 or newer).

1. In a script or tooling code, call the method {{{}Converters.RunInBatchMode(...){}}}.

1. Observe the compiler warning (CS0618) and the associated message in the Console.

Actual Result:
The method is marked as obsolete with a warning message stating it will be removed and that one should "use the UI". The message is abrupt, does not explain the technical rationale, and causes concern for users who rely on this API for automated import pipelines and custom tooling. The warning implies there is no programmatic alternative.

Expected Result:
The API should be kept, and instead showing a console warning. It should clearly communicate the technical reason for why UI is a better approach. (e.g., the API's unpredictable behavior) and offer clearer guidance. The recommended phrasing is:
{{"Using this API can lead to incomplete or unpredictable conversion outcomes. For reliable results, please perform the conversion via the dedicated window: {}Window > Rendering > Render Pipeline Converter.{}"}}

Reproducible in Versions:
Unity 6.4 and above

Additional Context:
https://discussions.unity.com/t/planned-breaking-changes-in-unity-6-5/1694205/35