Don't forget 'I hope to personally save the planet by solving the value alignment problem in artificial intelligence', which is where he's spending most of his time. Those are side projects he wants to do with the help of (I'm assuming) the other rationalists in Berkeley.

FWIW I'm super excited about EY doing angel investing, I'd view an investment from him as more signal baring (and more of a trophy) than a YC investment... though I'm not sure how common a feeling this is.

It's unfortunate that his tone / style of writing generally annoys exceptionally smart people. It took me several years to get over it personally.