Comment by leptons

The physics of travelling at 600mph+ would affect the rough surface differently than at 60mph. Airplane wings experience erosion due to the high speed combined with particles in the air - dust, ice, volcanic ash, and rain/water. The erosion is a problem that sees significant mitigation. If the surface were made to be rough I'd expect some unexpected results, and it may even become a bigger problem. I do think the technique should be tested though.