From my friends at Mac360, a look at Chrome with Flock on top:
Flock isn’t for everyone, of course. I don’t know what the business model is for a free social browser, but if you use Twitter, Facebook, Flickr, LinkedIn, or YouTube, the integration is useful, and that makes it the best new Mac browser. In the end, it’s an elegant, fast, stable, secure web browser. Prettier and more useful than Chrome at the same price.
It’s difficult to disagree with the assessment, but no one has flocked to Flock for years. A Chrome engine won’t attract new users.