Both artifacts are still being published though. Is there preference for people to use the HttpClient backend? Should the docs mention the AsyncHttpClient backend (or is that just legacy support now)?
The HttpClient backends are now part of core, cats, zio modules directly. See the appropriate docs page (e.g. Synchronous backends — sttp 3 documentation) for the dependency coordinates.
Moreover, AHC has been de-deprecated, as there’s now a new maintainer for the library.