I'd also disagree Slack is a good app. I've used it, Spotify, and a few others. I never understood the point. You're running a web page. It feels like a web page. It drains your resources just like a web page. Just because your web page runs in a window that doesn't have your web browser window frame doesn't make it native. It's a pointless exercise of tomfoolery.

Not to mention you have to install and update an app now. It's not even as convenient as the web.