I'm reading the comments on that article at the NY Times, and just came across the one that lucy mentioned, from someone named Richard ("I have done my duty and my duty does not include cherishing their 'stuff'."). He said a couple of things that I thought were really striking: "I no longer am oppressed by guilt passed down through the family like stocks and bonds" and "I am no longer haunted by my dead relatives and all of their fears, regrets, failed hopes and demands on my time." Sounds like a heck of a legacy to free oneself from.
My mother has been gradually working on sorting through the papers and Stuff in her house, and I'm very grateful for that. My dad's house, on the other hand, is still very full. I'm willing to help clear some of that out (we live in the same area), but until I have a handle on my own stuff, I'm not well situated to do much work on his & stepmom's house.
I'm 49, with no kids, but already thinking about making sure I don't leave a house full of Stuff behind for someone else to deal with. (I'm not terribly acquisitive, and don't like shopping, but when you live in one place for a couple of decades, Stuff has a way of accumulating.)