I love this perspective. I’ve worked with virtually all the leading chat apps (in the US) and the problems are consistent: great for quick communications, but if used constantly, they are too disruptive. Yes, email is overused and should be replaced whenever appropriate. But there are several discrete kinds of non-email communications; some lend themselves to transitory messaging. Others need video. Some you want to pass on to others, some you want to keep. And sometimes you want to meet face to face. I think the lesson may simply be: use what works for you, and don’t let others determine the tool all the time.