COBOL legacy systems in finance and government are somewhat of a meme. However, I've never actually met a single person who's day job is to maintain one. I'd be curious to learn what systems are you working on?
This is oddly true in my experience. I ask people where they get their information from and the channels are generally a lot more sparse than topics posted to HN.
If I were to venture to guess: I'd say "most developers" seek work-life balance and aren't interested in reading long-form articles on how to do X or Y when they are off the clock.