I dont think RoboB0b has met an untimely fate.
Well, I have witnessed quite a few of sinlge-creator burnouts, and I fear its that. However, if that is the case, chasing him down or summoning by lava burnt goblins might not really help us (as good an idea the latter is). Even if we get him to show up, if he has a burnout, he wouldnt be very productive - and even feel worse about himself for finishing his own dream project (he called it like this in the early days). Having dealt with burned out people, this would be the last thing that would help.
But you guys have been very civil about this situation, and I thank you for it. If anything, should he come back and read this, he will probably feel better about it all, and not feel like an angry mob is threatening him. I had good times with this game, and gotten every cent i spent in it back in hours of fun. There isnt a single AAA title that could reach it (so far, I still have some 30-40 years ahead of me, if civilisation holds up). I guess this counts for something.