The unmentioned thing here is why? Why does the world with a smartphone and today's hyper-connectivity seem so different now compared to what it used to? Did people feel the same way when the railroad and other forms of rapid transport showed up? What makes things feel so different? Is it more competition, and for what? Is it that things are just faster, and the certainties have changed? Has it fundamentally changed…
Because we went from living in a world where information about the world around us was hidden, to suddenly having access to all of it. It's surprising, jarring and overwhelming and it's probably going to take multiple generations for people to figure out how to use it effectively, ignore the noise, and deal with the social issues created by it.
One wonders the degree to which our mental health actually thrived better with that extra time, accidental rather than deliberate discovery.