I will mend just about everything except jean zippers. Sometimes I can fix them without taking them out, but they are usually too hard. I think mending is a challenge. I have ripped out mending done by others when I bought something at a garage sale, just to do it right and so it looked better.
I just mended grandson's pant knee using the back of the leg from his recently deceased grandfather's pants. Grandson was very pleased. He is 20 years old.