It would take 3-4 hours once home at our set stop time to "shut off" our brains from thinking about what we were working on - and switch over to "being home" mode and interacting with spouses etc. without being irritable.
We also all had disturbed sleep from "programming dreams" once we could shut our brains down and actually fall asleep.
This is nothing new, I know - but it was intriguing (and frightening) to see these effects manifested consistently across our entire team.