I'd love to quit my job. I've been with the same company for ten years, and am going absolutely nowhere.
However - I've become a complete expert at it because of all that time spent. It's not challenging in the least, which is both bad and good. I'm not in poverty, and though I'll never own a house, I can afford to live alone, which is important to me. Also, I've been working from home for nearly 6 years now, and those jobs are increasingly difficult to find. No commute, get to hang out with my kitty, actually cook something for lunch, etc.
So...though I am unquestionably in a rut, it's one of the better ruts one can find themselves in.