We don't ask for forums because we don't want features of Discord. We ask for forums because we want features that Discord does not offer:

1. Ability to search the discussions from a web search engine
2. Proper segregation of threads - a question followed by related replies (similar to github discussions, issues and PRs)
3. Ability to back up the discussion history, so that it doesn't disappear if the server goes down.
4. Ability to operate unimpeded if the silo operator decides to monetize the information by holding it hostage.

Note: Privacy is not what we need here. We need the solutions to open source problems to be public - especially, searchability.