I fail to see the point of the post. In the situation that OP describes, Slack would only really replace IRC in his equation and maybe the phone calls since peo

I fail to see the point of the post. In the situation that OP describes, Slack would only really replace IRC in his equation and maybe the phone calls since people can interrupt you by calling now. You can definitely snooze notifications and, if you're missing critical to-dos and tasks because they're getting lost in Slack chats, then you and your coworkers are not using Slack correctly (or, at the very least, you're not good at communicating urgency and/or priorities). He's/she's complaining about a human problem and blaming it on a piece of technology.