So, I graduated from law school 20 years ago, and -- given even the internet THEN, like, pdfs over mail -- that law journal filing cabinet thing was actually already dying; I had more than enough past history of outlines and stuff.
That all being said, I would be entirely unsurprised if the "mythology" of "YES the journals have the secret fancy sauce that no one else can get" lived on.
Also -- and I don't necessarily want to denigrate law school professors, it's another thing that's just gone on so long that "this is how we do it" -- yes, the law School "Socratic method" (at worst) is an effective form of possible professor laziness; they can just "ask questions about the cases" and not really teach.
Related to how law school "textbooks" aren't textbooks. They're literally just a bunch of cases slapped together with a tiny bit of commentary (unless that's maybe changed too, I hope?)
Again, not all professors, you CAN still teach very well under this framework. -- but it is an out for those fancy people who's forte isn't teaching.