Until you have to move. And then it's "Why the hell did we keep that? What IS that? Where did that come from?" Needless to say, the Mrs. and I have dumped several boxes of random stuff at Goodwill, and even more boxes into the dump. That doesn't count the bonfires we've had from paperwork that we didn't need, but had PII on it.
And that doesn't count the stuff we've sold off, like a massive plate glass table that was just too big for the house, along with the six chairs that went with it. I'd say we're down at least 1000 pounds from when we got here.
Why in the hell did we have so much crap?