[samora]

You need to establish some rules to make Slack work for most teams without overload.

1) People should avoid DMing each other when talking about work, use threads instead (see 3) to discuss topics in team channels (see 2).

2) Keep channels to a minimum. Every person shouldn't have more than 2/3 channels they need to pay attention to. A private team communication channel (eg #dream-team) and a private work channel (eg #dream-team-engineering) is enough for most teams. All team members are in the private team communication channel. A work channel is specific to a domain, such as engineering. Example you don't want engineering work banter to distract those working on other stuff.

3) Use threads religiously! This is super important as it helps declutter the Slack experience and keep conversations heavily organized.

[Groxx]

I really wish Slack would let users / channel-moderators move messages. Push them into the thread they belong on, copy-to-room for ones that need broader visibility, send question X to team Y's channel, etc.

Instead, what's done is done, and it can lead to rapid degradation in communal rooms that have a lot of newcomers.

[KennyBlanken]

Or just switch to Zulip where everything is threaded...