I would pick a different example. The 21st Amendment rescinded much of the power 18th Amendment gave, but then retained: "The transportation or importation into any State, Territory, or possession of the United States for delivery or use therein of intoxicating liquors, in violation of the laws thereof, is hereby prohibited."

So, perfect example of the ratchet effect: go forward, but then not all the way back. Okay, okay, ratchets don't allow any backward movement, but close enough.