If I get too old to wear jeans, I'll be pretty much naked. I own 3 pairs of jeans and 3 pairs of yoga pants. I think I still have one pair of "slacks" for funerals. I hope they go with Nikes or flip flops because that's the only shoes I own these days.
My personal policy is "if it aint comfortable I aint wearing it". Panty hose, high heels, push-up bras, and such fall directly into the aint comfortable category.