Yes, my mother is one of those people.

She was freaking out about all the stuff I had left in her attic when I moved out (and overseas) years before. I was confused because I didn't leave that much. And sure enough, my brother looked up there and all that clutter consisted of three small boxes sitting in the middle of a totally empty attic.

Every few years she throws out or gives away anything she considers unused or unwanted, including things that to others would have significant sentimental value. And often she ends up having to buy new items because she threw that same thing out a year before.

She is the anti-hoarder.