Now, I can't profess to know pg's reasons for not doing that, but he definitely shouldn't! Why? This would start him on that long, slippery slope of becoming a manager, i.e. the sad metamorphosis from a hand-on, still living technology throughly person, to one who interacts it secondhand, through ideas only.

Look around in any large company, you will see these guys who were once brilliant engineers but now just don't have the time to code.

Unfortunately, with YC getting bigger and more prominent by the day, I think this may be inevitable.