Fantasy Life i has an anti piracy measure that is true to its subtitle "The girl who steals time". The game upon boot will randomly decide whether or not to stop saving your game. No matter how many hundreds of times you manually save or the autosave runs, the only thing that changes is the info on the save screen, the save file wont be updated correctly. You can't tell when its going to either since sometimes when you boot it WILL save correctly. All just luck if an entire play session will go up in smoke. Am using fitgirls files with ElAmigos latest update to 1.3.2, this issue has been occuring since before 1.3.2 though, this is just the first time i've lost over an hour of play.
That's like asking "why not skip using the napkin after eating icecream."