That thing where you put on a fresh pair of socks and one has a hole so you think well I went to all that trouble to pull it on, this will be your last day little buddy, I’ll just throw it away after I wear it today.
Last chance underwear happen now and again as well but I guess it depends on where the hole is.
I just looked it up and my first pair of darn tough socks are 7 years old with no signs of failing. I feel like I got my money’s worth. I’m not sure I would even make a warranty claim at this point.