We built the tools. Now the tools build us.

You didn't notice when it happened. Neither did I. That's how tools work. They don't announce the changes they make to you. They just — over time — make them. McLuhan called it "the medium is the message." Most people skipped past that line. What he meant was simple: the tool you use reshapes you more than the content ever will. Slack was built to cut down email. It did that. But it also built something else — a culture of constant availability. Nobody wrote that into the spec. The tool just mad