Coding is clearly really useful for repetitive stuff and to deal with lots of data, but from my own 10 years of experience practicing law I honestly do not see anything in particular that would make a lawyer benefit more than other professions from coding.
Looking back at my time, maybe having an app that had contract clauses and allowed me to quickly set up a base one from the templates would be helpful and save some time. Nothing huge.
Managing lawsuits is a great candidate, but there are already dozens of "spreadsheet apps" that do that, as are there apps to keep track of contracts (expiry, increases, thresholds and so on).
A lot of research is already taken care by Google and other apps (consider Brazilian law practice here, which is based on Civil Law so a little different than Common Law in US, UK, Canada).
In summary, learning to code is not really that huge of a deal for a lawyer. It is still helpful like it is for most professions, but I honestly do not see a lawyer that codes having that great advantage over one that doesn't.