An elderly couple I know has lived in the same little house for over 50 years. They raised their kids there and it has served them very well, until now.
The problem is that there’s not a lot of room to move around in their house, and they both use walkers. So “traffic jams” are not unusual.
There is one solution: remove some of their furniture to make more room for them to get around. But they’re very attached to their belongings and don’t want to allow any changes to be made (their offspring are willing to do the heavy work).
This actually reflects a common problem that keeps people of all ages from decluttering: they hate change, so they would rather live with belongings that no longer serve them than to give them up. That’s how they end up living in cluttered houses.
In a large house this might not be such a problem (unless even the hallways are full of clutter). But in a small house, it takes very little for the halls and traffic patterns to become blocked. Only someone who is committed to keeping their home livable would be willing to get rid of possessions if that’s what it would take to keep them in their home.
I’ve thought that about my own small house. The living areas have some spare space, but the bedrooms do not. They’re pretty small. If we live here until we’re elderly, we’ll have to get rid of some furniture in order to move around safely if one or both of us end up using walkers. We have several tall bookshelves that are full of our treasured books and hobby materials. They would probably be the first to go.