Glad you get to see your idea existing - quite a few engineers of a certain low-level inclination tell us they had imagined (or tried) doing this. There were a

Glad you get to see your idea existing - quite a few engineers of a certain low-level inclination tell us they had imagined (or tried) doing this. There were academic implementations of this sort of thing around quite a while ago - and VMware's record/replay tech - but these days we have Undo LiveRecorder, rr / Pernosco, Microsoft's WinDbg / TTD, replay.io The idea's time seems to have come...