I'll play devils advocate. I like Slack, and having a group communication tool has only increased my productivity. How? - Having a place to easily search for issues others have had in the past. Sure, you can search emails or ask the same questions, but it's nice to search and find answers from other peoples conversations. - Integration for production alerting, customer feedback, and deployment pipelines. Instead of m…
Slack can be a terrible tool if you let it, but it can be wonderful, too, if you tune your notifications, and use DnD when you need it. Also, schedule DnD for non-work hours so you are never bothered outside of work hours, unless there is a true emergency (and if you work at a place with a lot of emergencies, then you have a shitty workplace). It's a tool. Use the tool, don't let the tool use you.
What about scheduled DnD for days off? Ability to /ignore annoying bots? Two basic features which should've been added long ago.