If you want less stuff live in a smaller home. I'm looking at 1 bedroom homes right now because I want to scale down a bit and avoid accumulating more (bed, reloading press, and garage is all I want/need yet I have all this other crap). Also, they're cheaper than dirt for obvious reasons.
You are absolutely right. The only thing that messes that rule up is that we've now got storage facilities for extra stuff popping up all over the country.
It's true though, that generally don't buy it if you don't have a place to put it. One reason that I didn't consider a full size pickup truck is that my garage ain't big enough.