We started using Teams at work and its UI is awful compared to Discord. The worst thing is notifications -- by default you get a popup for every single message that somebody sends. So then you change the settings to only pop up when somebody @s you. Good luck getting all your coworkers to do that; 90% of the time you will get a message and then just not see it for an hour because Teams didn't prompt you.

Discord solved this. Small red icon on the dock icon indicating that there are messages in a server you haven't muted. The icon changes to a number if you got a ping or DM.