Before the core idea became the real-time news, it evolved from being a tool for personal status updates, a way to coordinate small groups, a way to search for public sentiment on certain events like political debates, and a few other mini-incarnations I&#x27;ve missed.<p>Perhaps someone using Twitter to coordinate their small group or family meet-ups denounced CNN, Bloomberg or Reuters as &quot;nonsense&quot; when those organizations appeared on Twitter.<p>And that&#x27;s the core product problem - there&#x27;s always a potential that the old core idea is no longer relevant, and perhaps a stream of photo updates (Instagram, Twitpic), a stream of video updates (Vine) or real-time video broadcasting (Periscope) is the next big thing and therefore the new core idea.