It would be great to have a list to which you could add a course from any term, and they would all show up together. On the new list page, you would see the year a course was added, but they would be in one "wishlist." Sometimes you see a course was offered in the past, and you just want to keep track of it in case it's offered in the future, or remember who taught it.

It would be awesome if you could toggle a notification option for each course. Maybe you add a course to the list just because it's in a field you think is interesting. But if you do want to take it someday, then you could toggle a switch so that if it is registered to be offered the next term/year, you would receive a notification.

A course like this I came across is Ecosystem Ecology. The course is specific enough the EEB department doesn't offer it every year. (It's subject is also really cool to me.) It is general enough that anyone in the department could teach it in the future.