I know of several families (the parents on both my side and my wife's side) where reading the newspaper over breakfast is normal. Only these days the newspaper is often a digital subscription on a tablet or phone.

It's another small step to browse social media (after all, that's how a lot of people get their news) in the same way, or over different meals than breakfast.

All in all, I share your observations, but I'm also not surprised if other people have to make that decision consciously.