Hi, should I use LocalRuntime or ExternalStoreRuntime when using AI SDK with External Data Store (Postgres)?

The Runtime Layer docs state:

If you have a stateful API to integrate, use useExternalStoreRuntime, if you have a stateless API to integrate, use useLocalRuntime.

But the Picking a Runtime docs state that:

For popular frameworks, we provide ready-to-use integrations built on top of our core runtimes:

@Yonom, would appreciate your insight here as I'm guessing docs may be out of date.

It appears to me that import { useChatRuntime } from "@assistant-ui/react-ai-sdk" does a lot of the heavy lifting of integrating backend that uses AI SDK that I would have to do myself if I were using useExternalStoreRuntime. BUT, I've heard of other devs having a difficult time using the LocalRuntime (used under the hood by useChatRuntime) with their backend that persists messages. See #2349