>> If that older Unix or C++ programmer doesn't have a strong bias against Javascript, functional programming, new es6/es7 concepts, and web appliactions in general, then sure. I see many of these types of people even on HN with biases though.

You might want to check your own bias in favor of functional programming. To the more seasoned programmers this is just the latest fad. That's not to say there isn't value in it, but if you're making hiring decisions around it you've probably got your head in the clouds.