Totally agree! Humans are not made to have 20+ conversations going on at the same time, especially while doing actual work. Just stop it, radically, and open Slack only two times daily: in the morning for like 20mins, and in the end of the day for 20mins. Strict Slack timeslot. It doesnt matter how many unread messages there are, just ** it and do ONE thing at a time, and totally forget about everything except your actual work. Try it out ;)