Isn't Growth More Important than a Grade

Over the last number of years, I've often thought as an educator that we should be more concerned with the growth of a student (where did they start and how far they have come) rather than the result of a test/quiz or assignment.  As a music educator, I am all about the progress and the growth of the student rather than the mark on the page.  To develop skill, which music develops so many different skills, one must gradually and continually work towards the smaller goals. Students and adults all learn at different paces, so someone may demonstrate huge progress for them as an individual, but it won't result in them demonstrating this on a test/evaluation.  This will also get the students to further develop a growth mindset with them looking at how they can improve rather than the % grade.  It would also have them look more at the progression of learning, self-awareness and individual goal setting.