Here's about another skill that we are loosing: darning.
Back in 1941 it was a common thing to do; clothes had to be kept as long as possible. I reckon we will need some time to practice this skill......
A DARN THAT LOOKS LIKE KNITTING
It may be that your most attractive jumper has a moth hole in it where it shows most. In this case you will have to mend it by grafting so that it won't show. Thread a needle with a length of matching wool and run it along the garment just before the place where the stitches have gone. Put it through two stitches at the lower part of the hole, draw it through, and pick up another tow stitches at the top of the the hole, then down again into the lower stitches. Draw up tightly enough to fill the gap, but not so tightly as to put any strain on the main section of the garment. Grafting forms a line of imitation knitting that is non-detectable.
As long as a garment is not too far gone, neat efficient mending will give it a new lease of life. Repair where you can, and renovate where you can't.
Norfolk fisherman's jumper museum Sheringham 2011