1-Up!
Quote from Serris:
One of the questions is: Would it make sense to allow one and not the other, and is there a reason to not allow both?
I don't see why any run should be able to be called "single-segment" if there is a save and quit involved. Note that single-sitting does not mean the same thing as single segment. I'm not sure if pulling from the rules in this thread is necessarily appropriate, since this is the rules reworking thread; however, the rules state that "Runs that don't use saves are referred to as single-segment (SS) runs." By contrast, a run must be considered segmented if it utilizes save and quits of any sort.
Unless you plan to challenge the very definition of single-segment and segmented as previously laid down by the site (and maybe you do), this idea of saving and quitting in a SS run seems rather absurd.
Perhaps I'm missing the point all together, but I just dont understand how a SS run could involve a quit and reload.