Well, maybe it's just seasonal affective disorder, or Portlanders being weird, but every programmer I've known who's been in the field longer than maybe 15 years is a little bonkers.

I wish there was a good study on mental health in aging programmers, to validate what has always been obvious from experience. We have a shelf life. This work is challenging and affects your brain chemistry if you spend your career constantly immersed in difficult programming tasks.