Ralph, No offense but I disagree there is "no" degradation of the highlights. Even on this monitor I can see some highlight compression. Not bad but I wouldn't make a habit of overexposing.
Trust me, there is no highlight compression in the actual prints. Anyway, the improvement in the shadows is significant. Even in these scans, the degration of the highlights is minor. The point was not to make a habit of it, the point was the latitude towards overexposure.