Convenience in race conditions: when the power blips in and out, after you save the game--not before.

On the flip side, most serious file system's developed since circa 2000 tend to handle "Opps, power pull" pretty well, or had already grown things like journaling support by the end of the '90s.

Which is why I expect my game save to actually load instead of shouting crap, crap, crashola.