I'm my 40s over here and in my life I've owned 3 full houses of...stuff, so much stuff, really nice stuff!!! Now I own almost nothing and life is much easier. I find the comments here really funny, now I am free I realize how trapped I was by my trappings, your uncle was a smart guy.
There gets to be a point where you have to assert you own the stuff, not the other way around. And cull ruthlessly. It's hardest with a partner or if you grew up frugal and get hung up on "giving it away to good hands."