I am in sweats right now, and they are pretty much all I wear. Since I work from home, I live in sweats and save a lot on clothes, I suppose.
I do have a few pairs of jeans that no longer fit - but the reason I keep them is that I don't like at all the modern style of jeans. I don't like the "ride on the lower hip" style. I like jeans that are more covering. So I have to keep my old jeans and hope I fit into them again at some point, because otherwise I'm stuck with jeans that I find to be a bit indecent.
Sweats, at least, have full coverage.