Keep in mind that any community or group will have a certain amount of echo-chamber quality to it, if it is growing or churning (which usually happens). The new folks need to see this stuff to understand community norms, and this is a pretty natural way for transmission of that. I work at a university, and I used to feel the same way, about how every fall we would have to go over basics yet again, but then realized that this phenomenon is how we make new grad students into regular grad students. (and I'm pretty sure the getting sick of it step is a requirement for the Ph.D.)
a) Yes, there are quite a few articles about vim that show up on HN's front page.
b) I am a long time -- 20 years now? Really? Gah! -- vim user, and some of the articles have shown me things that even I didn't know.
Insofar as emacs is concerned, I'm not sure why you are mentioning it. It is a good, respectable editor.
Start with `i` for insert mode and `<ESC>` to return to normal mode. and `:x` to save and quit.
From there, when you want to know what a command does, go to normal mode and type `:help command` Do this once per day. Maybe twice if you feel adventurous. Use `:helpgrep` if you need to find something specific and don't know where to begin.
You will feel like you've been missing out.
How did that happen? The HN community decided what they liked and continued to reinforce it with articles, blog posts, tutorials. And if the next generation of HNers are to have a similar experience, I don't think that evangelism of such things is a bad thing. Sure, it's boring for you, but we're getting new people here every day.
Want to sell them emacs instead? You can. These choices aren't set in stone, and I'd argue that HN is more or less pragmatic. If something becomes inconvenient to use, cue the posts about alternatives.
(Edit: I enjoy vim. I prefer it to Emacs. I have sometimes found interesting things in these articles. I just think there are too many, and too much zealotry in the community)
As a result, I've looked at plenty of Vim evangelist links on HN looking for inspiration in learning more about productivity with the editor, and honestly?
This is one of the first that has given me some real insight, some workable examples, and something to go on.
It does have a cheerleader tone to it, definitely, but really? I wish more "advocacy/evangelism" posts on HN had this flavor (and substance) to them.