You've been lucky, then, to work in a low stress environment and have yet to encounter a stressful one. The nature of the work is less of a factor in the stres

You've been lucky, then, to work in a low stress environment and have yet to encounter a stressful one. The nature of the work is less of a factor in the stress than you co-workers. Stress is created by people, and their personalities and management styles. When hiring, people tend to hire others like them, so you end up with a distinct company "culture", since people who match it stay, and those who don't, move on. So, if you start with a culture of stress in a company, it's going to continue in that direction, and if you end up there and don't fit with their culture, you will be stressed out, even if your colleagues might not. I've been working in tech for going on 30 years now, and I've seen plenty of super-stressful workplaces.