Earlier quoted context omitted.
They removed it for all apps that auto save. Save as doesn’t really make sense if an app auto saves and only serves to confuse. You now duplicate and then save.
When I saw the previews for Lion I thought autosave seemed like overkill. When I'm working on anything I "autosave" by reaching over slightly and hitting CMD-S every time I make any small amount of progress. The last time I experienced significant data/progress loss was probably about 3 years ago before I developed this habit. I don't see what problem they're trying to fix.
Um, that?
The concept of "save" was good for a time, but having everything autosave is absolutely forward progress.
My Macbook Air just kernel panicked about 20 minutes ago (which, admittedly, shouldn't happen). I had to hold down the power button, and then turn it back on. Less than one minute after the crash my laptop's state, opened programs, tabs, files, unsaved progress, was restored.