As others have pointed out here, diversification of skills is the closest you can get to a guaranteed job as a programmer. Back in the day, when Flash was the

As others have pointed out here, diversification of skills is the closest you can get to a guaranteed job as a programmer. Back in the day, when Flash was the cool thing and you would get an AS3 library for every .js library that you see today, Many AS3 developers looked invincible. Me being one of them. Until Flash died. It just died in a month. Two things happened. A group that didn't diversify and didn't want to move out of their comfort zone, lost jobs, some became pizza delivery guys. I know a few. They had time, but they didn't leave things behind. Another group of developers, moved on. Not only away from Flash, but away from anything that seemed slightly in trouble. And you know what? All of these guys are doing brilliantly.