Zuckerberg is one of the architects responsible for its demise, so he'd be well-placed to declare its death. Early facebook really was an amazing product; all you saw was content from your friends, no one shared links, it was just a way to communicate with each other. Importantly, very few people were on facebook, which helped people be much, much more candid on the platform. Zuckerberg killed both of these features -- pushing garbage and ads, pushing the feed, and populating facebook as thoroughly as possible. I looked at my early feed (~2008?) years ago, and it was actually just friends catching up and girls flirting with me. I wasn't even that popular. To them, it was just another chat venue. They'd never consider the same these days. The platform is a cesspool.