I'll bet that lady spends most of her time "shopping" and not actually sewing.. I've seen this before, she can't quilt, so she aquires, and then brags about the large stash.
I have a fairly large stash but have figured out that I want to buy more NOW fabrics. I can't justify it when I have yards and yards of perfectly good, pretty fabric. My solution is to sell what I can and then reinvest in something new. If I don't sell any, I don't buy any!