Really? I'm surprised many people would disagree. Slack is slow, bloated, has threading as an afterthought, is really hard to navigate, and is very bad at traversing history.
In Slack, if I've been away and going through channels to see what I've missed, and want to go back to something I just saw, it's impossible to find again unless I remember the channel name. In Zulip, just scroll up.
In Slack, if I've been away and going through channels to see what I've missed, and want to go back to something I just saw, it's impossible to find again unless I remember the channel name. In Zulip, just scroll up.