It has never been anywhere close to certain, we just had 20 years of wild, unsustainable growth that encouraged people to cover their eyes and pretend the ride would go on forever. 20 years of telling everyone under the age of 30 that of course they should learn to code and that CS was the new medical or legal degree. 20 years of smugly acting like we are the inevitable future when we are, in fact, subject to the same ups and downs as every other career.