I've been a professional developer for ten years myself, I've seen my part of hype. But I've seen way more people not even trying new things (and trying does not mean sticking with it on your main project), probably because they could not stand the idea that the experience they are so proud of could be invalidated in any way.

As an old dev that mostly (not completely) likes new tech, the novelty is often subtle, and almost always has a point to it.

What is mock worthy are the attempts to make everyone's pet technology a floor wax AND dessert topping. But that's mostly VC funding at work