Ando85 said:
Why they say don't turn the system off while saving. In my long gaming career (20+ years) it has only happened to me one time during a thunderstorm.
The warning about not turning off the console while saving is to prevent a manual power cut by the user. No warning can ever prevent a random power cut due to something like a thunderstorm.
It's only happened to you once in 20+ years because you've only had one random power cut in 20+ years, but if you manually cut the power to the console when it was saving, then you would experience corrupted saves almost every time you did this.