I once became so famous that a community of several hundred people knew and recognized my name for a few years. At the time, it was very ego-flattering, and I was delighted to have done something that had such a big and positive impact. However, as an experience it really did not agree with me, and even this very minor level of fame has left me resolved to never, ever, ever become that famous again if I can help it.

I don't think I am unique in that. In fact, I perceive that it is very normal for public figures, not merely to fade from public attention, but to actively seek out seclusion.

While I'm not Satoshi, I would put the odds of someone in such a position of maintaining radio silence far from "zero chance". I would put it more around 70 or 80 percent. And at any rate, it is certainly what I would do.