There is also the possibility that he merely retired the handle and is here under a new name. He has in the past been accused of not being a real trader ("how could a real trader post so much?") and late last year accused of being a shill for the industry, again because he has "posted so much". He doesn't let people get to him, but he might have decided 20K is a good time to start afresh. If so he would hardly reveal that as it would defeat the purpose of changing.
Whatever, he has left behind a ton of stuff and many people capable of answering the typical questions that crop up, so there is no reason to let this thread die. As much as we got from him, we should be equally willing to give to those who come in future.