@joel the Fedora project says on their website that they, "...use Matrix/Element and/or IRC to speak to each other in real time and mailing lists for longer discussions for which short live chats may not be enough."
https://docs.fedoraproject.org/en-US/project/join/
And Fedora also says on their website, "Visit Fedora’s official chat platform, https://chat.fedoraproject.org (powered by Matrix)."
https://docs.fedoraproject.org/en-US/project/help/#_fedora_chat
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