What makes you think older people are passionate about the latest and greatest JavaScript frameworks? That is not my experience at all. New frameworks are just the same old stuff in a new wrapper. We've seen it all several times over. Like, backprop was a cool thing in the late 80s.
I, too, find this post sad, but probably not for the same reasons you did. This post, that makes me and you sad, doesn't make it any less of a fact that the young people in this industry think you are a useless dinosaur if you don't know what the new hot thing is about.