I had some Levi's 501s that I got at a farm supply store for $12 when I was in college (early 80s). I wore them regularly for about 15 years then occasionally until a few years ago. They had no holes when I donated them. Newer 501s don't last anywhere near that long.

Carhartts are more functional for me now, but they wear out after 5-8 years depending on the style (model?). I haven't noticed any change in durability since I started wearing them 18 years ago.

I have several pairs of Injinji socks that are close to 10 years old, and still in great shape. I have also worn out two pairs of those socks after about 5 years, and the newer ones are softer so I suspect they'll be less durable.