By Simon Dumenco, Crain News Service NEW YORK (June 11, 2013) — Facebook is one of the digital world's great shape-shifters. The social media website has endlessly changed its user interface, its business strategy and (notoriously) its privacy policies over the years—but one thing that's remained constant: We all love to complain about it. In fact, hinting at, or outright predicting, the eventual demise of Facebook has become something of an obsession for a lot of the media. Business Insider, for instance, recently ran a post titled, "You Have to Believe This Chart Makes Mark Zuckerberg Slightly Anxious." The graphic came from Kleiner Perkins' Mary Meeker and it plots the results of a survey of 2,000 social-media users, age 12 to 64, who were asked in 2011 and then again in 2012 which social-media products they use. YouTube, Twitter, Google+, LinkedIn, Pinterest, Instagram, Tumblr, Foursquare and even MySpace all gained. But Facebook actually shrunk a bit.