I would agree with you, except that Slack promotes actively that culture of quick response and disruption. And I indeed blame that most work cultures took that

I would agree with you, except that Slack promotes actively that culture of quick response and disruption. And I indeed blame that most work cultures took that in blindly without reflecting on what the impact would be. I see it as something similar to the rise of open-spaces. Now there is a backslash against it because people finally realize that it was overhyped and that open-spaces are maybe not always that good. Regarding emails, I disagree with you. It is still my go-to channel for deep technical discussions on difficult subjects on which you need to reflect. With emails, I have no pressure to respond directly. When I respond, I will write multiple well constructed paragraphs where I explain why I would do this or this technical choice. Emails are archived easily and can be reread and referenced later. Slack is a dumping ground of irrelevant messages, the opposite of your experience.