On the contrary, I think using a single tool (i.e. email) for every type of communication is the anti-pattern. The fact of the matter is that real-time chat is much better suited for most types of conversations that happen in a typical workplace.

My policy is that if the email is going to be less than two paragraphs, it's better to send it as a Slack message (or IRC or whatever your team uses). But if you need to elaborate on an idea, or bring someone up to speed on something, then write an email, and make sure it's exhaustive.