I started graduate school this fall, and went down to part-time at my job. I'd originally planned to keep Slack notifications turned off on days I was focused on school. Everyone was aware I wasn't working on those days, and the rest of the team is perfectly competent and able to handle themselves. In the event of a true emergency, Slack gives colleagues the option to override snoozed notifications, and some people also had my phone number and instructions to send a text.
I kept checking Slack anyway. I never saw anything that couldn't have waited—there were no "oh my god, I'm so glad I saw this" moments—but I kept doing it. I finally gave up and decided to leave the notifications on, and now I check the app less.
So, am I worried about missing something important, or is it just dopamine? I really don't know!