While looking for Discord alternatives I came across this project which looks like a great alternative for the kinds of Discord servers centered around Open Source projects and organizations. Ones where live chat and voice rooms aren’t the focus.
It’s a combination of forums and knowledge base that would be perfect for this use case.
I think the metaphors refer to different aspects of the project. The gardening refers to a more deliberate, small scale, cultivated experience tailored to your community, which is opposed to commercial factory farms that produce a monoculture on a massive scale for profit.
The permanence refers to the fact that you own and control the data, so you are in control of its lifecycle, not a third party that could kill it at their discretion.