I disagree, I find that the grok replies are terrible product UX. Not only do they clog up the replies of every popular post, they're also constrained to extremely short answers with no sources. The community notes system, while also flawed in its own ways, is at least not nearly as disruptive and usually provides a link.

Trying to make social media a source of truthful information is always an uphill battle and doubly so for X.