I had been at the company for over a decade, and had gotten quite lucky in the RSU lottery & thought, wait, I have enough money to last forever, so why do I do this to myself?
My health was bad, I was overweight, smoked, was depressed. I felt like it was going to kill me if I stayed another decade.
So I quit. In the years since, I stopped smoking, lost 1/3 my bodyweight & really got my shit together. I dink around on personal projects and learn new things. I follow HN because I'm genuinely interested in tech & now I can pursue what things I want, rather than those I need for $JOB or $NEXT_JOB.
I miss the good people I used to work with, but this is almost completely offset by how much I don't miss the assholes and the hassles (annual review, recruiting, meetings, explaining basic math to MBAs, etc).