I like the message board model, like Basecamp, myself. * You can respond in a delayed manner and not appear rude. * Complex stuff can be previewed before subm

I like the message board model, like Basecamp, myself. * You can respond in a delayed manner and not appear rude. * Complex stuff can be previewed before submission. * The subject and thread organization adds more fine-grained control than you usually get with Slack channels. The #team-name channel might have discussions on several topics at once, not all of which affect you, and no easy way to filter them. On a message board, it's easy to break out a new thread even if people are subscribed to it by default. * Slack search is ugly because you come back two months later and have to pull the info out of a tangled discussion with unrelated stuff in the middle.