I don't know about "shutting down"; I'm just too busy at work to think about anything but work. (Maybe it's also a bit that I have ADHD, and know that a 15-min

I don't know about "shutting down"; I'm just too busy at work to think about anything but work. (Maybe it's also a bit that I have ADHD, and know that a 15-minute conversation about non-work subjects, that I actually focus on rather than practicing "active listening" toward, would flush 100% of my built-up mental context for what I was doing down the toilet, and so blow an hours-plus hole in my productivity for the day.) I talk to my coworkers about non-work subjects if we head out for drinks. But at work, I work. Or at most talk about "light subjects" that can fit on top of my mental "stack" without having to pop anything.