In my experience, a big danger is when someone higher in the company hierarchy is a former developer who no longer writes code. Such person will perceive the n

In my experience, a big danger is when someone higher in the company hierarchy is a former developer who no longer writes code. Such person will perceive the new language features or libraries as "too clever, and not really necessary", will voice their opinion loudly, and you can't make them learn and find out that it's actually simple and useful. (And, yes, lambdas in Java 8 were an example of that.)