Facebook uses a variant of Facebook to have employees promote their work internally. I think it makes sense for larger organizations - person to person chat and

Facebook uses a variant of Facebook to have employees promote their work internally. I think it makes sense for larger organizations - person to person chat and all hands are missing an element in the middle where teams may want to promote the outcome of a particular project to their larger org, but not to everyone. Right now I've seen Slack channels used for that purpose, so it makes sense to help augment that with some additional features. Medium bandwidth, medium reach. You might argue this sort of communication is unnecessary but it's very hard to get big orgs consistently on the same page. An all-hands is just not the right tool for that.