Even though such a question would be more useful, I'm glad they didn't go that route as it would be dishonest: Too often we see the "why should I learn this?" questions that are really transparent "Why I haven't and won't bother -- my mind is firmly made up -- and here's how I pretend that I'm just being open minded in critiquing it" posts.
Many of us are happy in our niche, and learning new things is often a PITA. We're happy with what we do and how we do it, with the tools and things that we're used to. And that's okay. The truth is that the language evolution is something that we can mostly just ignore, and if eventually something is truly dominant for a use case, we can easily adopt it with no real handicap over people who ground with it from the ugly beginnings (and many of those advantages will percolate to other platforms anyways. node.js is just layers and layers of compromises and problems, but it had a profound impact on other platforms, and truly changed the web serving game).
And that's okay. But traditionally if someone posts resources for a particular language, it is bad form to engage in language wars, gloating, holier than thou (which the whole scarequote "maybe it isn't `trendy'" sorts of posts really are), etc, in the discussions. They're boring, we've had them literally thousands of times, and they are a distraction from discussing the actual contents of the post.
I've noticed this particularly afflicts Go discussions. Python, Rust, D, Swift...all can be discussed rationally and productively. But if Go appears, it seems to be just threatening enough that it draws out people concerned about things they don't know.