[bengale]

It feels to me that the type of communication slack is used for can't scale to a huge company, rather than it being a tooling issue. It's useful to be able to pull disparate people into a channel when working on a project, or to be able to find someone from another team to ask a question. But, expecting people to be able to discuss things with everyone from a large organisation all of the time just seems destined for failure.

At a certain size it probably makes sense to have actual humans in each department working out what communication needs to flow to the rest of the organisation and moving it in a different tool. Maybe links to those "publications" are posted in an all hands channel that most people have muted until they're ready to sit down and catch up with what everybody else is doing, but I can't imagine a situation where they should be getting notifications in real time about it.