We have other signals now.

Before we would find an intriguing post on the internet from years ago, and you have to verify it with additional research--it's easy to skip that additional research.

With a LLM when you're skeptical you can interogate it. One thing we know for sure is LLMs are quick to admit mistakes were made when interrogated, comically so. A LLM might not always recognize its own mistake, but at least it is available for easy interogation, unlike the forum posts of old.

Manual research from reputable sources remains an option.