As we know in FM7, there is no saving function during competetion with AI. For quick play, that is ok. But for endurance racing, especially requires lots of laps or 24 hrs competion, I belive most of players are not able to finish it once.
Like F1 series, there is saving function during competetion. For example, totally requires 50 laps running. I can save the progress @ 20 laps. Next time I open the game, I can continue the competition to finish the rest 30 laps. Especially for 24 hrs competions, players could finish it in several times but not must in one day.
I hope Turn 10 could add this function into the coming new forza motorsport. Not everyone is professional player, but this could lead everyone to attend the long period competetion with AI.