I want a time machine to go back and prevent the US decision makers to not fret about keeping a color system backwards compatible with B&W. I don't care to use the time machine to prevent war, making stock picks or sports bets. I just want to make my future career a little less insane by stopping this idiotic (in hindsight) decision. If there's enough time, I'd try to convince them to keep working on progressive scan and avoid more complications to my future career by not needing to deal with interlacing issues.