I have maybe 20 pair that I think all got bought together years ago. I used to wear each pair probably once every other week for 2-3 years. They all started noticeably thinning around the toes and heel. No holes but close enough to be nearly no difference. I switched to another brand of socks for work and these still get worn on weekends occasionally. This is all to say, I've definitely worn them out even if it takes a bit longer than dirt cheap ones.