He wouldn't have left if he could advance hoomanity further there, the guy has like a 800ms delay for each word and that does not make for a very good liar, perhaps a dutiful one.
>>unrave+(OP)
The word delay depends on who he is talking to. On his Dwarkesh interview from a year or so back he speed up noticeably, presumably because Dwarkesh is a fast thinker/talker.