Actually, I am an engineer, and I myself try to keep up with new technologies. But that doesn't mean I will use them just because they are new - in my mind that is additional risk. I have used my share of technologies which were made obsolete anyway, and it's no fun converting your codebase. But I guess the cool junior engineer who went to another company and left her old company taking care of her project using not-new-anymore / obsolete technology, doesn't care much about that. But I guess if she can't articulate why her newest technology stack is better, we should just switch?</rant>