I agree - If you're focused on debugging. But there's much more to that. "Running backwards" is not "replay". Running backwards a clock-program will result in h

I agree - If you're focused on debugging. But there's much more to that. "Running backwards" is not "replay". Running backwards a clock-program will result in hands turning anti-clockwise. Not mentioned the possibilities you can do, if program-speed can be set beetween 100% and -100%. I think most people think about that as they do with nearly every true innovation: "What schould that be good for?"