https://www.newyorker.com/culture/cultural-comment/slack-is-the-right-tool-for-the-wrong-way-to-work
Data gathered by the software firm RescueTime estimate that employees who use Slack check communications tools more frequently than non-users, accessing them once every five minutes on average—an absurdly high rate of interruption. Neuroscientists and psychologists teach us that our attention is fundamentally single-tasked, and switching it from one target to another is detrimental to productivity. We’re simply not wired to monitor an ongoing stream of unpredictable communication at the same time that we’re trying to also finish actual work.