Earlier quoted context omitted.
But do you curl matching socks or not? If you have many different styles, you need to go hunt around and find matches. Curl or not just delays the matching problem, it does not solve it. Having all the socks be the same makes matching an O(1) problem.
but if you curl them after drying, you have a much smaller pool to find the pair from, the just washed socks (which will be the socks you use the most anyway). So it's faster that way, than to mix them all up and only then match.
Laundry-folding happiness is increased significantly when I don't have to play "Find-the-mate" every time I pick up a sock (which applies to my kids' socks as well, since they are all patterned, but thankfully my son likes wearing party-colored socks, so I only need to match on shape).
I have two "vintages" of socks -- the old ones that I hate, and the newer ones that I prefer, roughly equally divided. I would donate + re-buy if I had more than two flavors of socks.