That’s what I wondered too. If it was all part of a particular kind of brain. He reminded me too much of my ex-husband, also a high level programmer, and his sleep habits and growing apathy and irritability while we were together (though he might point to me as the cause). Not to say my software engineer ex has the same condition, but maybe he has a touch of it. So many of us have just a touch of something that is clinical in someone else.