At our homes we have everything used by our grandparents, including their utensils,and pooja idols. The dresses were given off to a homeless charity, Barring a few small items, papers and books, rest is all still intact. We still have a Duckback raincoat ( an old thick sturdy) kept with us. Many might keep some items are still kept in their memory.
Some people may do it based on a wrong belief or advise that it is not auspicious to keep items after the death of a person.
What the author is referring to may be a handful of people who follow this practice.