I would love to have "global lessons" where the same lesson appears in multiple courses and updating the master lesson updates all instances of that lesson.

Also, if a student completes the lesson in course A, and then they enroll in course B which contains one of the same lessons, the lesson should be automatically marked as completed in course B.

Simplero kind of does this right now with the media library, so if I need to update a video, I can update it one time and all instances are replaced. But when it's not a video, it needs to be updated separately in multiple places.