> You'd see people who really knew the interface fly through tasks being multiple keystrokes ahead of the UI.

I remember.

This, unfortunately, killed people: Therac-25. Granted, the underlying cause was a race condition, but the trigger was the flying fingers of experts typing ahead, unknowingly having been trained to rely on the hardware interlock present in older models.

> This, unfortunately, killed people: Therac-25. Granted, the underlying cause was a race condition

So it didn't kill people, something else was that cause