Slack is the only chat app that I’ve used professionally that doesn’t show how many messages are unread in a channel I am subscribed to. The channel name gets bold and that’s it. Am I behind by 1 message? By 50? Who knows! Click to find out!

Now threads - in Google Chat and Teams - it shows the last, or the couple of last messages, if short, of the thread right under the message that started the thread, collapsing the ones in-between. This way I can see if I am caught up on thread replies without having to open it. But not slack.

It’s weird to leave slack for alternatives 5 years ago, just to cross paths again - and realize that all of the annoyances that were there - still are.