I learned about packing cubes while researching one-bagging. Minimization is the name of the game, which is why I was surprised to find that so many one-bag enthusiasts love packing cubes. Why add extra material when you are trying to save space?
As it turns out, the compression and organization you gain with packing cubes easily makes up for the few extra ounces. I have a special place in my heart for the tiny cube where I store my charging cables along with some fresh socks and underwear for easy access during airport stopovers.