> Resist the urge to cynically compare and contrast the old and new stacks. I have interviewed too many candidates who could not stop talking about how great their old language is, or how “these new hipster languages are just a fad”.

I thought at first this was headed in the other direction - e.g. candidates who could not stop talking about how great their new language is and how their old language is "a dinosaur". That is the tendency I have - to inflate the advantages of languages that interest me most because of their novelty to me.