I’ve never been a cram for the test kind of person. I do best when using knowledge in an ongoing basis. Regardless of AI, things I studied intensely a decade ago but never use are by and large gone, whereas things I use frequently stay and deepen.
I don’t expect it to be any different with AI, but YMMV.
OTOH, the output might stick?
Then the question becomes do you value knowledge for its own sake or for what it enables you to do? I don't have an answer.
I don’t expect it to be any different with AI, but YMMV.