Did some more sock sorting. There was a bag of socks that I thought were all odd socks, but then I remembered that it was left over from when I was still working and socks were just thrown into a small basket for sorting "later". Except many didn't get sorted because I'd just keep grabbing the obvious pairs and wearing them and the ones that were various shades of dark grey and black got left to be sorted "later, when I have more time". So now, some years later (!) I finally do have time. Some are not fit to be worn, so I'm using instructions someone posted to make them into taiwashi (a Japanese dish scrubber). Some were not even fit for that and have been thrown away!