The reason all of those incompatible chat protocols pop up is that all of the popular federated protocols lack features like inline image transfer, a usable backlog, persistence, live previews or gimmicks like code formatting and editing and third party integrations.
People want those, and value them enough to give up federation.
Its threaded conversation model really helps with ignoring discussion about topics you're not interested in. When I get back to an IRC/Slack/whatever channel, I spend quite a while catching up. 99% of the conversation does not concern me, yet I have to read it. Zulip's threading is a great solution to this.
People want those, and value them enough to give up federation.
My personal favorite is Zulip, by the way: https://zulip.org/
Its threaded conversation model really helps with ignoring discussion about topics you're not interested in. When I get back to an IRC/Slack/whatever channel, I spend quite a while catching up. 99% of the conversation does not concern me, yet I have to read it. Zulip's threading is a great solution to this.