I vaguely remember a piece of ballet wisdom to the effect of, “Miss one class and you'll notice. Miss two classes and your teacher notices. Miss three and the audience notices.”
I don't really have an audience, apart from all of you, but I can certainly attest that if you miss three classes, the effects are mighty dismaying indeed. I didn't miss all of those classes through sheer laziness; two were cancelled because of the holiday. But I missed them. It's amazing how fast the skills deteriorate. It bothered me enough that I don't think I'll be missing any classes from now on, whether or not the joy has gone out of it. If the joy ever decides to make a reappearance, I want to be ready for it.