Can I ask, does that mean you got so worn out so you couldn't work, had to stay at home / away-from-work for some time?
I wonder what happened afterwards. Seems you now work as an independent contractor now? (looking at your external profile, I hope you don't mind)
But after working on the same problem set for that long I got interested again in solving tougher problems and went back out on the consulting scene.
But that job forever changed my views on work life balance so I am now very aggressive with balancing hours for people that report to me even if I don’t balance my own hours.