[halfteatree]

But no one is saying you should use instant messaging or informal communication for everything. It's a tool, and it's good at certain roles, for example, a log that includes context for investigations into incidents.

For design docs, formal notifications, etc., there's still email and services like Quip. They are not mutually exclusive.

Having day to day discussions in informal channels and consolidating them into a more formal form of communication is a workflow I enjoy working with.