yeah i think he left. i rarely even saw him in game, because i think he was mostly AFK at spawners to get his texp... makes sense. too bad though, he was still a good person in the game and on the forums R.I.P Rtardo!
He peaked. He was the first to Hit a million Texp and probably got burned out. Also he's an adult and sometimes real life has to take priority, but I'm just speculating.