Most VN's allow saving at any point and saving to multiple spots. Usually, you also can speed through the text you've already seen, even skipping the lines from the paths which you have seen from the "failed" attempts. A few visual novels will even let you rewind to past branching points/choices, I imagine.
With the Ace Attorney games, it is a good idea to save every time before you take a chance or guess at how to progress so you don't collect too many "health" penalties and eventually lose the case.