I had unrestricted (dial up) internet access from a very young age and I _do not_ think it was good for me. I don't think having that access in my pocket at all times would have helped either (I didn't get smartphone until I was out of college in 2013).

Despite all the rules I've outlined in this thread, I really do believe in giving my kids as much freedom and autonomy as possible. I do not want to manage their time, I do want them to pursue their own interests and grow into their own person.

That being said, developing brains are not adult brains. It is a parent's job to fill in for that immature prefrontal cortex when needed. I can't expect a child to handle the asymmetric onslaught of the attention economy without negative side-effects. Have you seen the manipulative kids content on YouTube? How can a kid escape the recommendations tab with thumbnail after thumbnail specifically designed to draw them in?

So I will work with my kids to learn how use technology without experiencing all the ill-effects. At the end of the day, technology is just one of many tools they will use throughout life -- I don't let them use the bandsaw without help yet either. We'll make adjustments as they get older, but at age 7 things are still pretty hands-on.