This is one of the primary keys.

When taking college-like courses now later in life, I can do so with a much broader perspective. I can focus on the broader shape of the course and the information that intrigues me and place less focus on the nitty-gritty details that a high school or college student might be expected to memorize.

Of course, some of this would depend on the professor and the evaluations they planned on giving. If it was a humanities course where creating a paper or two was primary over memorizing details, then students might be able to get away with something closer to "professional" notes versus "student" notes. Depending on a syllabus, there could definitely be some overlap between the two.