It has already gotten to the point that it's being used in law school, by both student and professor, in Canada, as a matter of course. I can only imagine the same can be said elsewhere.
I'd say it's used by student to cheat at exams (which is an example of early adopting). It is a concern that hasn't been addressed correctly (but an urgent concern) in the law school I work with. Using ChatGPT to create course material and not checking the end result would certainly be viewed dimly... and in a real trial? Where you risk being disbarred for doing that?
Side note: a few month ago, a student cut and pasted from a book found with google scholar in a graded essay. It's sad that they didn't even try to reword the text with ChatGPT...