I mean I personally keep Slack on my Dock since it's open pretty frequently. This integrates it even more into my workflow since I can quickly check and see if

I mean I personally keep Slack on my Dock since it's open pretty frequently. This integrates it even more into my workflow since I can quickly check and see if I have any unreads/etc. making it more grating to switch to another chat app. Maybe it's not a "dark pattern" but it certainly is a method to increase adoption.