Comment by bbq

He sounds like someone who would give a great talk. I can see that happening for sure. I've devoted my life to a lot less before realizing there was more out there. These people put so much time into their work there's little left for a broad life - unless you make some clear boundaries like Mark is doing now. Maybe this will be a one time thing and, as you suggest, he may regret not making more time for other areas of his life. Maybe he'll manage to carve out more time for himself.