You are in a comment thread with the title “FLOSS communities right now”. I don’t know what you were expecting…
Forums serve no purpose anymore.
So programming.dev is useless and serves no purpose? A budding community must be online 24/7 to provide support because “I want the answer reasonably quickly”? Not even a budding community, imagine a community with many people and the chat moving forward quickly enough for your question to be out of scrolling view within minutes due to other discussions going on. Even in that scenario there is “no purpose” for a forum?