Honestly, it forces you to only keep what you really use. I did this with my closet and donated three trash bags of clothes. You stop buying junk because you see how little space you actually have. It sounds simple but it changes how you shop.
Wondering what exactly "works" means here. Sounds like maybe it just makes a small difference, not a life changing one. Hard to believe it's really that big of a deal. Seems like people get excited over pretty basic stuff sometimes.