There might be conceivable advantages that could benefit legal practitioners as you state. That possibly could be a singular area. It will be widespread use.
It looks, to me, to be a slow transition to all AI legal system; ie. juries.
Despite the fact that law is considered concrete, black and white, without emotion, there is a humanity to law, as evidenced by invocation of "the spirit of the law", that no AI can achieve.
It almost makes two movies, 'Minority Report' and 'Demolition Man' appear prescient.