And let's not forget focus modes... I have them that narrow greatly my default set of notifications, so I have a 3 tiers of notifications.
It's like the complaint I used to hear all the time: "Slack ruins work for me! OMG I can't work with constant interruptions!!" That is bewildering, because if that's how you feel, you haven't tuned your setup. Slack never interrupts me, yet I am response enough to slack messages. No one has ever complained about my response time. And I'm probably the most-messaged person on our Slack.