Slack culture is very toxic to productivity. Numbers of channels grows forever and at least in the places where I've been that use it, there's an expectation for a reponse to everything within a minute. So one ends up all day just looking at it, can't get any work done with interruptions every couple minutes.

Yeah. And if you don't respond immediately, you starting getting friendly reminders. "Have you found the problem yet?" "What do you think it is?" "Can you fix it soon?" Ugh.