That's eleven years, he's only been away 5. In that time we've had open configs, Rockingham, new Westhill, new Blackwood, many performance tweaks, and AX concrete. Just off the top of my head.
PS: Anyone got an explanation for 200+ hosts disappearing overnight, coming back overnight a year later, sticking around for another year, and then disappearing again? That first disappearance correlates to the start of the decline, the second to a lessening of it (Had it continued at the pace it kept up for those 4ish years, it'd've hit zero a couple of years ago). You can see it had a small effect in racers, with a slight lag. Not necessarily causation I know, but I'm curious.