But there doesn’t seem to be a useful slack-like thing for just “I’m going to be living in this place, who can I find housing with?”
Seems to me like EA Houses is doing that. What problem would the slack channel be solving that EAH isn't?
"Productivity" is indeed included in the description of the personal development tag. However, I do believe/agree that this is a really big and important category that could be broken down.
Spending a couple of seconds thinking about this, I'd come up with the following suggestions: