This is the perfect tool for film music were, for a sequence, you always got your several first tries, then you got the director’s comments and modifications on it, then the producer’s choices. And the music changes a lot across time and you’ll end with many many versions sometimes absolutely different cues/songs . Track versions are a godsend.
The most beautiful thing is for reconfo (don’t remember the name in english), when you got several versions of the cut coming and you have to resync everything each time. Now you can keep track of the modifications and come back !