Welcome to the Law Firm Disrupted, a briefing from Law.com editor Dan Packel that surveys new competitive pressures on law firms and how their managers are coping, plus insights on the tactics and tech employed by would-be disruptors. Have an opinion? Email me here. Want to be alerted to this dispatch in your inbox every Thursday? Sign up here.

One Am Law 100 managing partner is sticking around for another four years, another is making a hasty exit.