Understanding amendments would be a very good use case. Often changes to the law are not new laws, but changes in other laws. Any time I've tried to actually parse the law, I've found getting a good picture of the current state of the law, and a snapshot of the law in the past is tricky.

To take this example I found off the NYS assembly website legalizing adultery (it was the first one I found, I swear)

https://nyassembly.gov/leg/?default_fld=&leg_video=&bn=A0010...

It's phrased as "Section 255.17 of the penal law is REPEALED", but if you try to find "the penal law", but if you look up a a copy of the penal code do you see 255.17 in it? If so, how can you find out what was actually repealed. If not, do you need to hunt through every possible amendment to figure out the state of the law is at the time of reading?