That's what makes Slack presence so useful, I pause my notifications when I don't want to be interrupted -- others can see that in my presence (but if they real

That's what makes Slack presence so useful, I pause my notifications when I don't want to be interrupted -- others can see that in my presence (but if they really need me, they can choose to notify me anyway). So I can stay heads-down and work, but if something important happens, I'm still reachable. And at least in my company, people don't abuse do not disturb. Plus, I never need to wonder if it's safe to send a message to a coworker for their timezone "George is in Germany, am I going to wake him up if I send me a message now?" I can rely on him setting notifications appropriately.