The merits of a Slack PM over email are few and debatable, I agree. However only a member of my team can PM me on Slack and anyone can email me, so my Slack mes

The merits of a Slack PM over email are few and debatable, I agree. However only a member of my team can PM me on Slack and anyone can email me, so my Slack messages have a better signal to noise ratio. Slack adds much more value in the area of project-oriented channels which do get a lot of real-time conversation happening in them during business hours, and also retain an email-like record for anyone who logs in later on and wants to catch up.