All I know is they rearchitected Slack recently so that now the mobile app feels asynchronous, in a bad way. Like, you tap on things and they don’t get marked read — in the local app! — for <i>seconds</i>. Also, the unread count badge doesn’t match what you see when you open the app.<p>Slack used to be a really impressive user experience, but it has degraded significantly, not in UX design (though that’s also highly arguable) but in flakiness.