Many hoarders hope that, when they die, the sum total of the things they leave - will suggest a broader life to that which they have had.
I decluttered recently (an enormous task, with hundreds of journeys to charity shops, and recycling depots) - and feel freer, lighter, brighter and less burdened.
As well as being able to quickly lay my hands on the things I need - instead of having to have several boring and time consuming rummaging/retrieval sessions every week.