I go through jeans too fast to get them altered. I buy them at the charity shop and wear them (on rotation) until they're actually indecent (by which time they'll be used only for gardening and wood-splitting).
Call me tragically old — I'll wear that — but I do find that stretch jeans look better and are more comfortable than others. (For context, I'm approaching retirement, but I take jeans in a 32" waist and my lower body's still presentable.) I don't know why everyone doesn't prefer them.