This is one of the things that make this game so incredibly awesome. There is just such an insane amount of sidequests that can change so much. You can regrow a forest, change people's personalities, rebuild and ancient ruin, rescue a kingdom... So many optional missions, which some people may never discover, and which actually change the game world. The manipulation of time has consequences (not all good, as you find when you cause the creation of a judicial process in the past and get arrested in the future
), and you get to see those consequences.