alt Hacker NewsFun fact, overwatch must have done a similar things because they would let you play back games up until some release when you could no longer replay them unless you'd saved the render.
I think if I remember right there were also funny moments where things didn't look right after patches?
Overwatch also has “kill cams”, which basically create an entire alternate game state to show you how the enemy killed you, and they have the “Play of the Game” system that replays the coolest moment of the game at the end. It’s impressive tech.