It's still so damn big, though. It's also way too white and sterile for me. And are all of you half blind or something? I'm nearing my 40s, eyesight have deteriorated a bit, yet, I have no problem at all reading the site. Actually, Codex is one of the few remaining sites that don't have text that cover half the screen just for a few sentences, and it looks good to boot.
How far away is the monitor from you? Mine is at arms' length, so around 1m. 24", 1080p. Trying to read the codex at 100% magnification from that distance is like trying to read a newspaper or a magazine holding it in your fully extended arms. The effective font size is similar, and just way too small. I don't see how that's a good thing?
Pick up any book and put it next to your monitor that displays the codex at 100% zoom. The absolute size of the letters will be more or less the same, and actually there are lots of books that have much larger letters than that (which I prefer, btw). You can't seriously say that reading a book from a meter is the optimal reading experience? You'd hold a book much closer than that, wouldn't you?
The reason why 16px is considered the *minimum* these days is because that's what most people find comfortable reading on current screens in current browsers. Yes, some people can read much smaller text, but a website shouldn't be just for those people in the minority. I don't doubt it that you find reading small text okay, but a website shouldn't be just for people with exceptional eyesight (because that's probably what you have, so consider yourself lucky, while it lasts).
Your sight will deteriorate as you get older, sooner or later, that's a fact of life for 99% of people.