This comment by hgomersall on Hacker News explaining how smartphones steal your—for a lack of better word—disattention.
I’ve recently realised that the biggest problem with smartphones is not that they steal your attention (which is bad enough), but that they steal your disattention
I don’t know of a better word for it than disattention. Perhaps downtime? But it’s not so structured. It’s just those moments where you’d previously let your mind wander. Gone forever.