Yes.. I have since learned that he chose to move on do to the fact that his original projects were falling by the wayside and that Trek was more or less an experiment in nostalgia.
What I fail to understand though is why he shut down the FRS site altogether, orphaning his supporters and colleagues, and leaving behind no other means to contact him. It sounds to me as if there was some sort of final battle where "enough was enough".
Speculations aside, he has left at precisely the wrong moment, as I feel backlash from Into Darkness
has only strengthened the resolve of the old-guard to step up to the plate and tackle this problem fresh.