So, I just spent, dunno 1,5 hours reading that article (which is more like a book and as mentioned before, should have a table of contents for mere accessability), and it's really darn interesting.
As someone who used to love superhero comics as a teen in the nineties, but at some point got annoyed by the market and got so much more enamored by manga/european/indie stuff in comparison, many of the points made speak _directly_ to my personal experience.
These past 10-15 ish years I spent with a vague feeling that superhero comics weren't doing that well any more - but reading about these examples (like Marvel's Storm, cancelled after 11 issues!) is truly baffling. I googled a bit just now on some of these, and these sales numbers are crazy, considering how gigantic the mind share of these heroes is in popular culture. And how little comics like the X-Men/Avengers/Batman etc. could capitalize on that.
One personal anecdote, more as a sidenote: "All good things must come to an end." Neither me nor any of my friends enjoy media that goes on, constantly, without some kind of ending in sight, and superhero series definitely give that impression.
It's just so hard for me to care about hyped up story events (especially the infamous "deaths" of heroes) that I have the feeling, ultimately, won't matter. I.e yesterday I saw that Captain America thread in OT about his "shocking revelation", skimmed the thread and was like, Harrison-Ford-Who-gives-a-shit.gif.
I freely admit though that this is more of a feeling, and/or prejudice by now, festered over many years, and is unfair towards all good and well written superheroes hidden in this mess. Maybe I should give some superheroes another chance. But if it feels so cumbersome just to get back into it, and it's so much moe accessible to pop in one of the Marvel movies instead, or start reading a new manga at volume 1,.....why should I care?
Difficult.
PS: Thanks OP for the link, this was a very good read, and I genuinely learned something interesting, about something that barely interests me anymore!