I really can’t agree with any of this. Slack is a high-powered application with many functions, but its use does not substitute for other applications that are already in use. Thus it becomes another layer on top of the already burdensome layers of email, texts, IMs, tweets, and everything else. It really becomes more overhead, not a productivity tool. It would be a great thing if the rest of the stuff did not exist and people didn’t use them, but people do use these other things. I am deeply disappointed in Slack and frankly wish it would go away.