> If you’re not using chat, and someone is hoping for a response faster than email, they’re likely to interrupt you in a way that’s far more disruptive than chat, like walking up in person or calling on the phone.

If they have to physically stand up to bother you, I think that also makes them more likely to answer the question for themselves without bothering you at all.

Some people ... when they have chat, their bar for interrupting you is so low. I have a coworker who it almost seems like he'll interrupt me every time he sees an error message or exception on his screen.