You seem to have the impression that judges follow the law and see where it leads. In reality, judges tend to decide where they want to go and then figure out how to get there.
Judging and litigation will be among the last areas to be replaced by so-called AI, if indeed they ever are. People are infinitely complex and tend to disagree with one another.
Those in power tend not to want to give up their power. And judges are where they are because they want to be in power. So my guess is that end point will be entirely arbitrary. AI is used to get decision that judge wants one way or an other.