Tools use and shape us to the same degree that we use tools. We're not enlightened rational choice actors who correctly discard bad tools and only use good ones, most of the time we just pick defaults, because choice is costly and attention is in short supply.

Build a culture with bad tools and you get a messed up culture. Applies both to the structure of many companies and their communication tools.

Funnily enough the point about choosing Slack can actually be made for skilled professionals and their companies. They can choose where to work, curiously enough many actually up at precisely the firms their top schools are funneling them to.