That, and vim-like keyboard shortcuts (https://kato.im/articles/keyboard-control/)

And ability to use the same account to work with multiple teams at the same time.

Also markdown support.

That was my initial concern, but I've been chatting with a couple friends to try it out, as well as chatting with the founder. As it turns out, it's not confusing at all. It's a really FUN app to use. And the Vim-like keybindings are amazing.

I'm in love with a cat.

Also cross-org communication. If you're not into chatting with external parties, then think about how you would otherwise connect teams in a 500+ person company. I've tried a lot of tools but couldn't find anything that works when companies scale in size.