Disagree. I have worked more than a few shops so on Slack and other such tools that not being always attentive to a #slack feed was a mark against you as a “team player”. It is not just the person themselves. And some tools enable this sort of expectation, support it and make it easy. But perhaps saying it is more the people than the tools? I can buy that. I have also worked shops, especially those with open seating, where people would just walk over and interrupt one another for even the most trivial reasons all day or even loudly ask someone two or more rows away a question.