Harvey was valued at $15.5B in September, selling AI to lawyers. Many of them still get paid by the hour. Every hour the software saves them is an hour they can no longer bill. Thomson Reuters ran the math. If AI cuts a one-hour task to 12 minutes, a firm billing hourly loses 80% of the revenue on that task. So an hourly firm has little reason to pass the speed on to the client. My guess is that's a big part of why legal still feels slow to the people paying for it. The gain goes to the firm…