Using lots of browser tabs instead of applications appears to me to be a step backward in usability. Instead of relying on the window manager to organise your work, you add cognitive load instead.
Eh, you can just put Slack into it's own window if you're going to use multiple tabs for it. Personally, I just pin it next to my email and it works fine.
I'm not a fan of how much RAM or CPU it uses. I tried the desktop app hoping it would be better, but it seems like it's perhaps worse (I use Firefox, so
Not great for web developers. We have enough tabs open and if every window is a chrome icon it’s a pain to find stuff. I’ve got karma tests running, selenium tests, incognito windows testing security etc etc.