With the auto-save option, it'll be able to save the stuff you write.
For example, if I type a paragraph and forgot to save, then all of the progress will be lost and I will have to restart all over again. With the auto-save option, it'll automatically save for you, and you won't have to worry about not saving your progress.
However, if someone thinks that the auto-save option is stupid, then they can go to their profile and turn off the auto-save.