I wonder how much of that has to do with just being the kind of person that keeps up? I've always tried to at least dabble in the new, interesting languages.

I wonder how much of that has to do with just being the kind of person that keeps up? I've always tried to at least dabble in the new, interesting languages. First, because it stretches the mind. Secondly, when I detect true progress, I want to be on top of it -- which I think is the key reason I'm still relevant as a senior individual contributor despite having started the game in the era of punch cards. People that are coming in with fluency in Go, Erlang, Haskell, etc... indicates that they are paying attention.