just like a task expands to fill the time allotted to it, I think some people are just the type to fill the space allotted. It’s kind of like when you have a baby. You can make a decision that you are going to keep on driving a passenger car and put a packed diaper bag in the front and a stroller in the trunk and off you go, or you can buy a minivan or SUV and all of a sudden that thing is packed with all kinds of crap because you have the room to house lots of stuff in it.
I helped move a friend’s D home from Vandy (long story) a few years back. They are “stuff” people and the stuff that was in there! Decorations for every darn holiday. A collection of mugs. Handbags for every outfit. Scrapbooks from high school. A tall mirror (as if there weren’t mirrors in the bathroom). It filled an SUV and a passenger car. They saw nothing wrong with it. Of course it’s their business, but personally I prefer to be more streamlined.
I was helping my sister pack (she is moving) and she is hyper-organized. We discussed how we have kind of a “bug out” mentality - wanting the ability to pack up and go rapidly. Even though I’ve lived in the same house for 24 years and have no plans to move!