We plugged Replay QA into a staging URL for our main web app and it genuinely explores like a new tester would, no test script needed. It caught a broken checkout flow on a specific browser/viewport combo that our own manual smoke testing had missed for weeks, and the recording made it trivial to see exactly where it broke. Having it run automatically on every PR and post findings directly in the comments has cut down a lot of the "wait, can someone click through this before we merge" back and forth on our team.