GP's core argument is that a passing fad led to a poor technology decision. I see it all the time as well, the MongoDB example is far from the only case. This

GP's core argument is that a passing fad led to a poor technology decision. I see it all the time as well, the MongoDB example is far from the only case. This industry fetishes anything that's new and if it turns out to be a bad idea you can always get another job with a shiny new technology on your resume.