> Sure. What I'm really talking about is the modern ensemble of smartphone, social networks and app-centric economy. In 2007 they were still mainly "just phones".
That was already there in 2010. There was a Cambrian explosion of apps in 2008/2009, and Apple ran the “there’s an app for that” campaign in 2009/2010. Facebook was there on day one and there were multiple Twitter clients. Instagram launched as a picture-focused, iPhone-only social network in late 2010.
It would be nice to have a better fix on the historical location of the smartphone vis a vis obsessive, anxious use, but my reading of folks like Johann Hari and Tristan Harris puts it around 2013/15, which tallies with my observations in London.