TBH you land in a situation where you have 40 channels in the company you have to follow and it drains so much energy just to be in the loop.
Super hard to focus on anything if you know you can get pinged somewhere and you have to check or reply in timely manner.
Add to that emails and PRs and you spend 2/3 of your work day just enabling other ppl or answering questions.
Soo tiresome.
Yes and no. Yes, some individuals might suffer in the short term from the friction. No, the lack of that friction is not good for the team.
The context (i.e., article) is collaboration. That's not about individual GTD, it's about the health and long term well being of the team.
Granted, there are non-team situations but if size and or scale are involved that's less likely. A non-dysfunctional team has overhead. Skip that and while you may not have a dysfunctional team, you'll have a suboptimal one. Either way, that creates friction. The messy shitty kind.
Ultimately, communication between thousands of people is just hard, and technology solutions aren't going to solve all problems perfectly. And again, I want to stress that in general, Slack has been a pretty nice tool. We still just need to do other practices to make sure nothings flying under the radar.