Yes, it should have. And there were no good reasons (but lots of prevarications and excuses and so on) that it didn’t. Various people whose judgment I trust are saying it should get written. And right now it would be more of a re-jigging of posts and cutting and pasting and throwing in a few new bits.
Will it happen? “Maybe” is the best I am willing to commit to (which, I am aware, moves it more to the probably not end of the spectrum. So it goes.)