I bought two of Cal Newports books - I like his thoughts on mastering skills and digital life. He is spot on that children should be severely limited in the amount of time they can use digital devices.
I worry about digital addiction myself: yesterday, after a long day at work (coding and running some ML jobs), I had dinner and a Blu-ray movie-dinner with my wife, then spent almost two hours studying for an online class I am taking. That gave me over ten hours in front of a computer.
One thing that I try to do on my iPhone is to spend more time reading digital books or listening to audio books than surfing social media.