But mistakes do happen and I'd prefer to have some backup. I often will have 10 files open at once, and it is pretty easy to make a mistake if you are not ultra vigilant.
Either way, with a jpg PS doesn't protect anything. You can do a save (from a hot key) and you get no such dialog box. One can certainly have jpg masters.
Aperture also protects any master. You cannot overwrite those files with Aperture. Period.
They are two different programs - Photoshop and Aperture are mutually supportive.
j.


