This. This is why I've been more productive since I went WFH.

So many mental models went "poof" because someone just wants to barge into my office for something that could have been an email.

The best tool to improve intelligence will be indistinguishable from a room that accelerates time within itself so that the outside world, and all its distractions, appears to slow to a crawl. See Age of Em (2016) by Robin Hanson.