10,000 messages
And the fact we can quickly go through those without noticing shows how much of a fire hose chat systems are - one I am in for retro programming is unfollowable because by the time it is morning in my timezone about a thousand messages have been sent
That's why everyone on Hive uses Discord and the dev channels are on Mattermost.
I haven't seen those, guess they are invite-only or for core devs?
There is a dev Discord, and invite-only Mattermost.