There are several editors out there that save your file each second. I wouldn't use this function normally, mostly because my editors keeps track of the history on each save and I tend to use it fairly often to go back in time quickly and saving each second would make this is a real pain.
BUT because of a bug, sometimes my computer freezes without any notice and I would like to use this feature until I've sorted out the problem.
Now my question is, is it harmful for my SSD drive to make so many writes?
From what I know the best way to ensure an SSD will live long is to store data on it you need to access fast but to not use it for files that change constantly (like each key stroke).