Save points are incredibly important for those who have stamina issues such as Muscular Dystrophy, Multiple Sclerosis, and other neurological disorders. It can be difficult for some gamers to sit down and game for long lengths of time. Save Points allows for the gamer to participate in the game for as long as they are able to without being penalized for not being able to have epic gaming sessions. Many games implement save points at certain intervals throughout the game, but the longer the gaps are between save points, the more difficult (in an un-fun way) the game becomes for these players.
Ideally, each game should be able to be saved at any given moment allowing those who need to stop at a seconds notice the freedom to do so without fear of loss of progress.