syag > glimmers of potential developmental damage
I agree with that, but one should also look at developmental advantages. It is still an open question which one prevails, and depends on how family handle devices and life in general. I am all for careful approach to new things, but I am sure people complained that because of the evil cars, people will forget how to feed horses, and phones will stop people from writing letters, etc.
On the damage side, there are approaches to manage – have devices in public room, defined time access, etc. On the advantage: if kids see parents using devices responsibly: for work, comms, learning, YWN :), you can expect them to do the same eventually.
In my humble experience, trying to fight inappropriate behaviors with early teens is a losing battle – smart kids can break through any filters you can create and they have more time on their hands than I do … But once they started using everything constructively, things turned. No need to teach kids chores – I can just ask them to google how to use the vacuum.