Exactly how I felt it. Addiction-driven development. I found a different purpose in life a few years ago (religiously inspired). I started investing time in other fields and in people, for example homeless people. The big (and not entirely unforeseen) disadvantage was that I felt that my knowledge was gradually aging, because I didn't keep up so well as before. This turned out not to be a problem after all, you don't need to be in the front lines all the time.